85! = 85 × 84 × 83 × … × 43 × 42 × 41 × … × 3 × 2 × 1
Dividing 85! by 42 removes the factor of 42 in the middle:
85!/42 = 85 × 84 × 83 × … × 43 × 41 × … × 3 × 2 × 1
and the remaining divisor on the right consists of 84 integers whose product is
6,707,390,748,525,119,707,022,570,100,620,503,797,144,205,579,299,385,866,788,140,779,822,857,765,709,426,986,929,530,629,817,641,048,054,169,600,000,000,000,000,000,000
