[upd] update multiple operation

cypress/e2e/calculator.cy.ts

 describe("Calculator", () => {
   it("Default value on screen", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=screen_value]").contains("0");
   });
 
   it("add functions", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("1").click();
     cy.get("[data-cy=button]").contains("+").click();
     cy.get("[data-cy=button]").contains("3").click();
@@ -14,7 +14,7 @@ describe("Calculator", () => {
   });
 
   it("subtraction functions with negative result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("1").click();
     cy.get("[data-cy=button]").contains("-").click();
     cy.get("[data-cy=button]").contains("3").click();
@@ -23,7 +23,7 @@ describe("Calculator", () => {
   });
 
   it("subtraction functions with negative values", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("-").click();
     cy.get("[data-cy=button]").contains("1").click();
     cy.get("[data-cy=button]").contains("-").click();
@@ -33,7 +33,7 @@ describe("Calculator", () => {
   });
 
   it("subtraction functions with positive result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("5").click();
     cy.get("[data-cy=button]").contains("-").click();
     cy.get("[data-cy=button]").contains("3").click();
@@ -42,7 +42,7 @@ describe("Calculator", () => {
   });
 
   it("division function with integer result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("4").click();
     cy.get("[data-cy=button]").contains("/").click();
     cy.get("[data-cy=button]").contains("2").click();
@@ -51,7 +51,7 @@ describe("Calculator", () => {
   });
 
   it("division function with float result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("3").click();
     cy.get("[data-cy=button]").contains("/").click();
     cy.get("[data-cy=button]").contains("4").click();
@@ -60,7 +60,7 @@ describe("Calculator", () => {
   });
 
   it("division function with negative result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("8").click();
     cy.get("[data-cy=button]").contains("/").click();
     cy.get("[data-cy=button]").contains("-").click();
@@ -70,7 +70,7 @@ describe("Calculator", () => {
   });
 
   it("multiplication function", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("3").click();
     cy.get("[data-cy=button]").contains("*").click();
     cy.get("[data-cy=button]").contains("4").click();
@@ -79,7 +79,7 @@ describe("Calculator", () => {
   });
 
   it("multiplication function with negative result", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("-").click();
     cy.get("[data-cy=button]").contains("3").click();
     cy.get("[data-cy=button]").contains("*").click();
@@ -88,8 +88,23 @@ describe("Calculator", () => {
     cy.get("[data-cy=screen_value]").contains("-12");
   });
 
+  it("multiple operation", () => {
+    cy.visit("/");
+    cy.get("[data-cy=button]").contains("4").click();
+    cy.get("[data-cy=button]").contains("+").click();
+    cy.get("[data-cy=button]").contains("2").click();
+    cy.get("[data-cy=button]").contains("*").click();
+    cy.get("[data-cy=button]").contains("2").click();
+    cy.get("[data-cy=button]").contains("+").click();
+    cy.get("[data-cy=button]").contains("3").click();
+    cy.get("[data-cy=button]").contains("/").click();
+    cy.get("[data-cy=button]").contains("6").click();
+    cy.get("[data-cy=button]").contains("=").click();
+    cy.get("[data-cy=screen_value]").contains("8.5");
+  });
+
   it("reset function", () => {
-    cy.visit("http://localhost:4173/");
+    cy.visit("/");
     cy.get("[data-cy=button]").contains("7").click();
     cy.get("[data-cy=button]").contains("C").click();
     cy.get("[data-cy=screen_value]").contains("0");