#include <stdio.h>
#include <string.h>

struct bignum
{
       int x [ 10050 ], l;

       bignum ( int t ) { memset ( x , 0 , sizeof x ); l = 1; }
       bignum ( )
       {
              char s [ 10050 ];
              memset ( x , 0 , sizeof x );

              scanf ( "%s" , &s );

              for ( int i = 0; i < strlen ( s ); i++ )
                  x[strlen ( s )-i-1] = s[i] - '0';

              l = strlen ( s );
       }

       void PUTA ( int t )
       {
            for ( int i = 0; i < l; i++ )
                x[i] *= t;

            for ( int i = 0; i < l; i++ )
            {
                x[i+1] += x[i] / 10;
                x[i] %= 10;
            }

            while ( x[l] )
            {
                  x[l+1] = x[l] / 10;
                  x[l] %= 10;
                  l++;
            }
       }

       bignum operator * ( const bignum &t )
       {
            bignum ret = 0;

            for ( int i = 0; i < l; i++ )
                for ( int j = 0; j < t.l; j++ )
                    ret.x[i+j] += x[i] * t.x[j];

            ret.l = t.l + l - 1;

            for ( int i = 0; i < ret.l; i++ )
            {
                ret.x[i+1] += ret.x[i] / 10;
                ret.x[i] %= 10;
            }

            while ( ret.x[ret.l] )
            {
                  ret.x[ret.l+1] = ret.x[ret.l] / 10;
                  ret.x[ret.l] %= 10;
                  ret.l++;
            }

            return ret;
       }

       void PRINT()
       {
            for ( int i = l - 1; i >= 0; i-- )
                printf ( "%d" , x[i] );

            printf ( "\n" );
       }

       bool NULA()
       {
            if ( l == 1 && x[0] == 0 )
               return true;

            return false;
       }
};

void SOLVE()
{
     bignum BIG1, BIG2;

     if ( BIG1.NULA() || BIG2.NULA() )
     {
           printf ( "0\n" );
          return;
     }

     BIG1 = BIG1 * BIG2;

     BIG1.PRINT();

}

int main()
{
    int n;

    scanf ( "%d" , &n );

    for ( int i = 0; i < n; i++ )
        SOLVE();

    return 0;
}