diff --git a/Calculator with simple ui.py b/Calculator with simple ui.py
index e8489d08baf..122156a3cfd 100644
--- a/Calculator with simple ui.py	
+++ b/Calculator with simple ui.py	
@@ -1,75 +1,72 @@
 # Program make a simple calculator
 
-class Calculator:
 
+class Calculator:
     def __init__(self):
-       pass
-    
-    def add(self,num1, num2):
-        
+        pass
+
+    def add(self, num1, num2):
         """
-    This function adds two numbers.
-
-    Examples:
-    >>> add(2, 3)
-    5
-    >>> add(5, 9)
-    14
-    >>> add(-1, 2)
-    1
+        This function adds two numbers.
+
+        Examples:
+        >>> add(2, 3)
+        5
+        >>> add(5, 9)
+        14
+        >>> add(-1, 2)
+        1
         """
         return num1 + num2
 
-    def subtract(self,num1, num2):
-        
+    def subtract(self, num1, num2):
         """
-    This function subtracts two numbers.
-
-    Examples:
-    >>> subtract(5, 3)
-    2
-    >>> subtract(9, 5)
-    4
-    >>> subtract(4, 9)
-    -5
+        This function subtracts two numbers.
+
+        Examples:
+        >>> subtract(5, 3)
+        2
+        >>> subtract(9, 5)
+        4
+        >>> subtract(4, 9)
+        -5
         """
         return num1 - num2
 
-    def multiply(self,num1, num2):
-        
+    def multiply(self, num1, num2):
         """
-    This function multiplies two numbers.
-
-    Examples:
-    >>> multiply(4, 2)
-    8
-    >>> multiply(3, 3)
-    9
-    >>> multiply(9, 9)
-    81
+        This function multiplies two numbers.
+
+        Examples:
+        >>> multiply(4, 2)
+        8
+        >>> multiply(3, 3)
+        9
+        >>> multiply(9, 9)
+        81
         """
         return num1 * num2
 
-    def divide(self,num1, num2):
-        
+    def divide(self, num1, num2):
+        """
+        This function divides two numbers.
+
+        Examples:
+        >>> divide(4, 4)
+        1
+        >>> divide(6, 3)
+        2
+        >>> divide(9, 1)
+        9
         """
-    This function divides two numbers.
-
-    Examples:
-    >>> divide(4, 4)
-    1
-    >>> divide(6, 3)
-    2
-    >>> divide(9, 1)
-    9
-       """
         if num2 == 0:
             print("Cannot divide by zero")
         else:
             return num1 / num2
-calculator = Calculator()
 
 
+calculator = Calculator()
+
 
 print("1.Add")
 print("2.Subtract")
@@ -81,22 +78,21 @@ def divide(self,num1, num2):
     choice = input("Enter choice(1/2/3/4): ")
 
     # Check if choice is one of the four options
-    if choice in ('1', '2', '3', '4'):
+    if choice in ("1", "2", "3", "4"):
         num1 = float(input("Enter first number: "))
         num2 = float(input("Enter second number: "))
 
-        if choice == '1':
+        if choice == "1":
             print(calculator.add(num1, num2))
 
-        elif choice == '2':
+        elif choice == "2":
             print(calculator.subtract(num1, num2))
 
-        elif choice == '3':
-            print(calculator.multiply(num1,num2))
+        elif choice == "3":
+            print(calculator.multiply(num1, num2))
 
-        elif choice == '4':
+        elif choice == "4":
             print(calculator.divide(num1, num2))
         break
     else:
         print("Invalid Input")
-