public function dataProviderForScalarMultiply() { return [[[[1, 2, 3], [2, 3, 4], [3, 4, 5]], 3, [[3, 6, 9], [6, 9, 12], [9, 12, 15]]], [[[1, 2, 3]], 3, [[3, 6, 9]]], [[[1], [2], [3]], 3, [[3], [6], [9]]], [[[1]], 3, [[3]]]]; }