7.3

import timeit
from typing import Union


def time_it(func):
    def setup(*args, **kwargs):
        t0 = timeit.default_timer()
        func(*args, **kwargs)
        t1 = timeit.default_timer()
        print(t1 - t0)
        return ''

    return setup


@time_it
def product(*args: Union[int, float]):
    s, n = list(args), 1
    for i in range(len(s)):
        n *= args[i]
    print(n)


product(1, 2, 3, 4)