public function testMultiply()
 {
     $identity = $this->getIdentityMatrix($this->size);
     $array = array();
     for ($i = 0; $i < $this->size; $i++) {
         for ($j = 0; $j < $this->size; $j++) {
             $array[$i][$j] = rand();
         }
     }
     $matrix = new LL_Matrix($array);
     if ($this->strassen) {
         $result = $matrix->strassenMultiply($identity);
     } else {
         $result = $matrix->naiveMultiply($identity);
     }
 }