text: #include <gmpxx.h>
  #include <iostream>
  
  using namespace std;
  
  int main()
  {
  	mpz_class a;
  	mpz_class b;
  	a = "123";
  	b = "321";
  	cout << a << " + " << b << " = " << a + b << endl;
  	cout << a << " * " << b << " = " << a * b << endl;
  	return 0;
  }