409 return Tensor<Type_t, 3>(lhs(0, 0) * rhs(0, 0) + lhs(0, 1) * rhs(1, 0) + lhs(0, 2) * rhs(2, 0),
410 lhs(0, 0) * rhs(0, 1) + lhs(0, 1) * rhs(1, 1) + lhs(0, 2) * rhs(2, 1),
411 lhs(0, 0) * rhs(0, 2) + lhs(0, 1) * rhs(1, 2) + lhs(0, 2) * rhs(2, 2),
412 lhs(1, 0) * rhs(0, 0) + lhs(1, 1) * rhs(1, 0) + lhs(1, 2) * rhs(2, 0),
413 lhs(1, 0) * rhs(0, 1) + lhs(1, 1) * rhs(1, 1) + lhs(1, 2) * rhs(2, 1),
414 lhs(1, 0) * rhs(0, 2) + lhs(1, 1) * rhs(1, 2) + lhs(1, 2) * rhs(2, 2),
415 lhs(2, 0) * rhs(0, 0) + lhs(2, 1) * rhs(1, 0) + lhs(2, 2) * rhs(2, 0),
416 lhs(2, 0) * rhs(0, 1) + lhs(2, 1) * rhs(1, 1) + lhs(2, 2) * rhs(2, 1),
417 lhs(2, 0) * rhs(0, 2) + lhs(2, 1) * rhs(1, 2) + lhs(2, 2) * rhs(2, 2));