public function dataProviderForMultiplyMulti() { return [[[2, 6, 12, 20], [1, 2, 3, 4], [2, 3, 4, 5]], [[6, 12, 18, 24], [1, 2, 3, 4], [6, 6, 6, 6]], [[12, 28, 54, 80], [6, 7, 9, 10], [1, 2, 3, 4], [2, 2, 2, 2]]]; }