#!/usr/bin/env python3

import sys
import re

input_file = sys.argv[1]

with open(input_file) as fd:
    lines = [line.rstrip() for line in fd.readlines()]

t = 0
reg = r"mul\(([0-9]+),([0-9]+)\)"
for line in lines:
    for match in re.findall(reg, line):
        ast, bst = match
        a, b = int(ast), int(bst)
        m = a * b
        t += m
print(t)