Alright, let's work through 87500087 times 84610963 step by step
87500087 × 84610963 = 84610963 × (87500087)
+ 84610963 × 7 yielding 592276741
+ 84610963 × 80 yielding 6768877040
+ 84610963 × 000 that equals 0
+ 84610963 × 0000 producing 0
+ 84610963 × 00000 that equals 0
+ 84610963 × 500000 producing 42305481500000
+ 84610963 × 7000000 that results in 592276741000000
+ 84610963 × 80000000 that is equal 6768877040000000

= 7403466623653781
