import re

result = 0
with open("part1_input.txt", "r") as file_input:
    results = re.findall(r"mul\(\d+,\d+\)", file_input.read())
    for item in results:
        first_number, second_number = re.findall(r"\d+", item)
        result += int(first_number) * int(second_number)

print(result)