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+# HW2_Git_and_python
+
+We have written a mini-program `calculator.py `. The program accepts input (via `input()`) a string with some mathematical expression and prints a number - the result of calculating this expression. 
+The expression must consist of two numbers (`int` or `float`) and a mathematical operator between them (one of 4: `+ - * /`). All the specified elements are separated by spaces (example: `5 - 3`). 
+
+There are 5 functions implemented inside the script: `main' (which accepts the input expression) and 4 functions for each type of mathematical operations (addition, subtraction, multiplication and division).
+
+✨✨✨✨✨
+Our team: 
+
+Danil Spirin  
+Anastasiia Sycheva  
+Margarita Lantsova  
+Daria Chekanova  
+Andrey Nekrasov  
+✨✨✨✨✨
+
+![Photo of a joint call](./2025_09_15_20439.png)
diff --git a/HW2_Spirin/calculator.py b/HW2_Spirin/calculator.py
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+# def functions
+
+def mult_fun(n1, n2):
+    res = n1 * n2
+    return res
+
+def subtr_fun(n1, n2):
+    res = n1 - n2
+    return res
+  
+def add_fun(n1, n2):
+    return n1 + n2
+
+def div_fun(n1, n2):
+    if n2 == 0:
+        res = 'You cannot divide by Zero'
+    else:
+        res = n1 / n2
+    return res
+
+
+def main_fun(i):
+    n1, operator, n2 = i.split()
+
+    n1 = float(n1)
+    n2 = float(n2)
+
+    if operator == '+':
+        res = add_fun(n1, n2) # Addition
+        
+    elif operator == '-':
+        res = subtr_fun(n1, n2) # Subtraction
+        
+    elif operator == '*':
+        res = mult_fun(n1, n2) # Multiplication
+        
+    elif operator == '/':
+        res = div_fun(n1, n2) # Division - add condition for "Division by zero!"
+    
+    print(res)
+
+input_ = input()
+main_fun(input_)