No problem, we've got 8642 and 8640 to multiply
8642 × 8640 = 8640 × (8642)
+ 8640 × 2 yielding 17280
+ 8640 × 40 yielding 345600
+ 8640 × 600 which equals 5184000
+ 8640 × 8000 yielding 69120000

= 74666880
