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#!/usr/bin/python3
# Python program to multiply many large integers separated by spaces or newlines.
# The integers to multiply may be entered on the command-line or into standard input.
# Used by "primorial" with "matho-primes" to calculate large primorials.
# A primorial is the product of all primes up to a given number.
import string
import sys
prod = 1 # initialize product and make it an integer
args = sys.argv[1:]
if (args == []):
# read stdin if no command line args
while True:
try:
input_line = input()
except:
break;
for s in input_line.split():
prod *= int(s)
else:
# multiply together the command-line args
for arg in args:
prod *= int(arg)
print(prod)
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