28 × 27 × 26 × 25 × 24 × 23 × 22 × 21 × 20 × 19 × 18 × 17 × 16 × 15 × 14 × 13 × 12 × 11 × 10 × 9 × 8 × 7 × 6 × 5 × 4 × 3 × 2 × 1 =
This is 28 factorial
$${\mathtt{28}}{!} = {\mathtt{304\,888\,344\,611\,713\,860\,501\,504\,000\,000}}$$