import re

def parse(raw: str) -> list[tuple[int]]:
    finds = re.findall(r'do\(\)|don\'t\(\)|mul\([0-9]+,[0-9]+\)', raw)
    active = True
    pairs = []
    for f in finds:
        # Active or nah
        if 'do(' in f: active = True
        if 'don' in f: active = False
        if not active or 'mul' not in f: continue

        # Figure out the mult part
        parts = f.strip('mul()').split(',')
        pairs.append((int(parts[0]), int(parts[1])))
    return pairs


with open('data.input') as file:
    print(sum(m[0] * m[1] for m in parse(file.read())))