m0 = goog.vec.Matrix4.createFromValues(
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);
    var m1 = goog.vec.Matrix4.createFromValues(
        1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16);
    var m2 = goog.vec.Matrix4.create();

    goog.vec.Matrix4.multMat(m0, m1, m2);
    assertElementsEquals(
        [90, 100, 110, 120, 202, 228, 254, 280,
         314, 356, 398, 440, 426, 484, 542, 600], m2);

    goog.vec.Matrix4.scale(m1, 2, m1);
    goog.vec.Matrix4.multMat(m1, m0, m1);
  