#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
 
// demo of GNU Multiprecision library.  More at:
// http://en.wikipedia.org/wiki/GNU_Multiple_Precision_Arithmetic_Library

int main(void)
{
 mpz_t x;
 mpz_t y;
 mpz_t result;
 
 mpz_init(x);
 mpz_init(y);
 mpz_init(result);
 
 mpz_set_str(x, "7612058254738945", 10);
 mpz_set_str(y, "9263591128439081", 10);
 
 mpz_mul(result, x, y);
 gmp_printf("\n"
            "    %Zd\n"
            "*\n"
            "    %Zd\n"
            "--------------------\n"
            "%Zd\n"
            "\n", x, y, result);
 
 /* free used memory */
 mpz_clear(x);
 mpz_clear(y);
 mpz_clear(result);
 return EXIT_SUCCESS;
}