test.py

from _collections import deque


my_list = input().split()
print(my_list)
operator = ["*", "+", "-", "/"]
evaluate_list = deque()
result = 0
for el in my_list:
    if el not in operator:
        current_digit = float(el)
        evaluate_list.append(current_digit)
    else:
        if el == "*":

            while evaluate_list:
                number = evaluate_list.popleft()
                result = number * (evaluate_list.popleft())
            evaluate_list.appendleft(result)
        elif el == "/":
            while evaluate_list:
                number = evaluate_list.popleft()
                result = number / (evaluate_list.popleft())
            evaluate_list.appendleft(result)
        elif el == "+":
            while evaluate_list:
                number = evaluate_list.popleft()
                result = number + (evaluate_list.popleft())
            evaluate_list.appendleft(result)
        elif el == "-":
            while evaluate_list:
                number = evaluate_list.popleft()
                result = number - (evaluate_list.popleft())
            evaluate_list.appendleft(result)
print(result)