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diff --git a/HW2_Trofimov/README.md b/HW2_Trofimov/README.md
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+# Calculator 
+Yep. Calculator.
+
+This magnificent piece of software engineering is done by these killas:
+
+![screenshot](https://github.com/michtrofimov/HW2_Git_and_python/assets/92677906/862d524c-c68b-4229-b67b-f92ea140af84)
+
+- Ilia Popov ('multiplication' function)
+- Julia Nechaeva ('addition' function)
+- Ekaterina Shitik ('subtraction' function)
+- Ricardo Milos / Pavel Grobushkin ('division' function)
+- Michil Trofimov ('main' function) 
diff --git a/HW2_Trofimov/Screenshot 2023-09-13 at 20.28.41.png b/HW2_Trofimov/Screenshot 2023-09-13 at 20.28.41.png
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diff --git a/HW2_Trofimov/calculator.py b/HW2_Trofimov/calculator.py
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+def main():
+    calc_input = input()
+    calc_input_lst = calc_input.split()
+
+    operation = calc_input_lst[1]
+    number_1 = calc_input_lst[0]
+    number_1 = float(number_1)
+    number_2 = calc_input_lst[2]
+    number_2 = float(number_2)
+
+    if operation == "+":
+        res = addition(number_1, number_2)
+    elif operation == "-":
+        res = subtraction(number_1, number_2)
+    elif operation == "*":
+        res = multiplication(number_1, number_2)
+    elif operation == "/":
+        res = division(number_1, number_2)
+    return print(res)
+
+
+def multiplication(number_1, number_2):
+    res = number_1 * number_2
+    return res
+
+
+def subtraction(number_1, number_2):
+    res = number_1 - number_2
+    return res
+
+
+def addition(number_1, number_2):
+    res = number_1 + number_2
+    return res
+
+
+def division(n1, n2):
+    res = n1 / n2
+    return res
+
+
+main()
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