from lib import get_data

data = """123 328  51 64 
 45 64  387 23 
  6 98  215 314
*   +   *   +  """
data = get_data(__file__)

def mul(xs):
    r = 1
    for x in xs:
        r *= x
    return r

lines = zip(*[line.split() for line in data.splitlines()])

r = 0
for xs in lines:
    xs, op = xs[:-1], xs[-1]
    xs = list(map(int, xs))
    if op == "+":
        r += sum(xs)
    elif op == "*":
        r += mul(xs)
    else:
        assert False, "Unexpected op"
print(r)