Alright, let's work through 87118904 times 62791663 step by step
87118904 × 62791663 = 62791663 × (87118904)
+ 62791663 × 4 which equals 251166652
+ 62791663 × 00 producing 0
+ 62791663 × 900 that is equal 56512496700
+ 62791663 × 8000 producing 502333304000
+ 62791663 × 10000 yielding 627916630000
+ 62791663 × 100000 that is equal 6279166300000
+ 62791663 × 7000000 that results in 439541641000000
+ 62791663 × 80000000 resulting in 5023333040000000

= 5470340860897352
