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+# Mathematical Expression Calculator
+
+This is a simple Python console program that calculates mathematical expressions with two operands. It accepts a string as input, which contains a mathematical expression with two numbers (integers or floats) and one of the four operators (+, -, \*, /). The program then calculates the result and displays it on the screen.
+
+### *Features*
+___
+- Supports four basic arithmetic operations (+, -, \* , /)
+- Handles both integers and floats
+- Checks for division by zero errors
+- Provides error handling for invalid input
+### *Requirements*
+___
+- Python 3.6 or later
+### *To install*
+___
+- Clone the repository or download the zip file
+- Make sure Python 3 is installed on your machine
+#### *Developed by*
+___
+- Gorenkova Anastasiia (create main function)  
+- Kokinos Elena (create addition function)
+- Parfenova Polina (create multiple function)
+- Shchukina Elza (create difference function)
+- Zhidkin Roman (create division function)
+![team photo](imgs/team_photo.jpg) 
diff --git a/HW_Kokinos/calculator.py b/HW_Kokinos/calculator.py
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+def main(expression):
+    parts = expression.split()
+    operator = parts[1]
+    num1, num2 = float(parts[0]), float(parts[2])
+    result = 0
+    if operator == '+':
+        result = addition(num1, num2)
+    elif operator == '-':
+        result = difference(num1, num2)
+    elif operator == '*':
+        result = multiple(num1, num2)
+    elif operator == '/':
+        if num2==0:
+            return 'На ноль делить нельзя!'
+        result = deviation(num1, num2)
+    return result
+
+def difference(a, b):
+    return (a - b)
+
+def multiple(a, b):
+    return (a * b)
+
+def deviation (x, y): 
+    return (x/y)
+      
+def addition(a, b):
+    return (a + b)
+  
+print(main(input("Введите выражение: ")))
+      
+      
+
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