#!/usr/bin/env python3

import sys

input_file = sys.argv[1]

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

height = len(lines)
width = len(lines[0])

gears = dict()

sum = 0
for i in range(height):
    line = lines[i]
    pn_str = ""
    for j in range(width):
        c = line[j]
        # print(19, c)
        if c.isnumeric():
            if not pn_str:
                left = j
            pn_str += c
            # print(20, c, pn_str)
        if pn_str and (j == width - 1 or not line[j + 1].isnumeric()):
            for ii in range(max(i - 1, 0), min(i + 1, height - 1) + 1):
                for jj in range(max(left - 1, 0), min(j + 1, width - 1) + 1):
                    cc = lines[ii][jj]
                    # print(ii, jj, cc)
                    if cc == "*":
                        gears.setdefault((ii, jj), list())
                        gears[(ii, jj)].append(int(pn_str))
            pn_str = ""
for gear_numbers in gears.values():
    if len(gear_numbers) != 2:
        continue
    gear_ratio = gear_numbers[0] * gear_numbers[1]
    sum += gear_ratio

print(sum)