Multiplication Without Carry in C (using GMP Lib)

[ikilobo]

I was using GMP library for build an binary arithmetic, but for multiplication, I want to return a result a multiplication without carry..
How can I implementing it?
nb: the code below give a result of multiplication with carry

void multi(){
     int m_bit;int m_bit2;
     char *op1;
     char *op2;     
     char *final;
     
     mpz_t hasil_acak,hasil_acak2,hasil_pangkat,hasil_exor_temp,hasil_multi,hasil_multi_temp,hasil_exor_temp0;
     
     mpz_init(hasil_pangkat);
     mpz_init(hasil_acak);
     mpz_init(hasil_acak2);
     mpz_init(hasil_exor_temp0);
     mpz_init(hasil_exor_temp);
     mpz_init(hasil_multi_temp);
     
     mpz_init(hasil_multi);

     printf("input m-bit pertama: "); scanf("%d",&m_bit);
     gmp_randstate_t rand_state;
     gmp_randinit_default(rand_state);
     gmp_randseed_ui (rand_state, time(NULL));
     mpz_rrandomb(hasil_acak, rand_state, m_bit);
     //mpz_get_ui(hasil_acak);     
     op1 = mpz_get_str(NULL, 2, hasil_acak);
     printf("[%s]\n", op1);

     printf("input m-bit kedua: "); scanf("%d",&m_bit2);
     gmp_randstate_t rand_state2;
     gmp_randinit_default(rand_state2);
     gmp_randseed_ui (rand_state2, time(NULL));
     mpz_rrandomb(hasil_acak2, rand_state2, m_bit2);
     op2 = mpz_get_str(NULL, 2, hasil_acak2);
     printf("[%s]\n", op2);
          
     mpz_addmul(hasil_multi, hasil_acak, hasil_acak2);//[B]can I use other function or any code for replace this multiplication with carry? (I want a result of mutiplication without carry)[/B]
     mpz_get_ui(hasil_multi);
     final = mpz_get_str(NULL, 2, hasil_multi);
     puts ("\n\nHasil MULTI:");
     printf("[%s]\n", op1);printf("[%s]\n", op2);
     puts("_*_");
     printf("[%s]\n", final);

}