_NUMBERS example

[_NUMBERS] = {
  {_______, _______, _______, _______, _______, _______, _______, KC_P7,   KC_P8,   KC_P9,   KC_PSLS, KC_BSPC},
  {_______, _______, _______, _______, _______, _______, _______, KC_P4,   KC_P5,   KC_P6,   KC_PAST, KC_ENT },
  {KC_NLCK, _______, _______, _______, _______, _______, _______, KC_P1,   KC_P2,   KC_P3,   KC_PMNS, KC_ENT },
  {EXT_NUM, _______, _______, _______, _______, _______, _______, KC_P0,   KC_P0,   KC_PDOT, KC_PPLS, KC_ENT }
}