import numpy as np

LINES_NUM = 5
COLS_NUM = 1000

count = 0

probs = np.array([])

with open('input.txt', 'r') as file:
    for line in file:
        for num in line.split():
            probs = np.append(probs, num)

    probs = probs.reshape((LINES_NUM, COLS_NUM))

    for col in probs.T:
        if col[4] == '+':
            count += int(col[0]) + int(col[1]) + int(col[2]) + int(col[3])
        elif col[4] == '*':
            count += int(col[0]) * int(col[1]) * int(col[2]) * int(col[3])

print(count)