Alright, let's work through 87133344 times 42303172 step by step
87133344 × 42303172 = 42303172 × (87133344)
+ 42303172 × 4 that is equal 169212688
+ 42303172 × 40 that is equal 1692126880
+ 42303172 × 300 that results in 12690951600
+ 42303172 × 3000 yielding 126909516000
+ 42303172 × 30000 resulting in 1269095160000
+ 42303172 × 100000 that results in 4230317200000
+ 42303172 × 7000000 which equals 296122204000000
+ 42303172 × 80000000 yielding 3384253760000000

= 3686016838167168
