text: module.exports = function multiply(first, second) {
      if( first.length < second.length )
      {
          let temp = second;
          second = first;
          first = temp;
      }
      let ar1 = first.split( '' ), ar2 = second.split( '' ), r = [];
      let rlen = ar1.length + ar2.length; 
      for( var k = 0; k < rlen; k++ )
          r[ k ] = 0;
      for( var j = 0; j < ar2.length; j++ ) 
          for( var i = 0; i < ar1.length; i++ )
              r[ 1 + i + j ] += ar1[ i ] * ar2[ j ];   
  
      for( var k = rlen - 1; k > 0; k-- )
          if( r[ k ] >= 10 )
          {
              r[ k - 1 ] += Math.floor( r[ k ] / 10 );
              r[ k ] %= 10;
          }
      if( r[ 0 ] == 0 )
          delete r[ 0 ];
      return r.join( '' );    
  }
  