No problem, we've got 18287512 and 84072921 to multiply
18287512 × 84072921 = 84072921 × (18287512)
+ 84072921 × 2 yielding 168145842
+ 84072921 × 10 producing 840729210
+ 84072921 × 500 giving us 42036460500
+ 84072921 × 7000 that equals 588510447000
+ 84072921 × 80000 that is equal 6725833680000
+ 84072921 × 200000 which equals 16814584200000
+ 84072921 × 8000000 that equals 672583368000000
+ 84072921 × 10000000 producing 840729210000000

= 1537484551662552
