Alright, let's work through 87419728 times 90158732 step by step
87419728 × 90158732 = 90158732 × (87419728)
+ 90158732 × 8 resulting in 721269856
+ 90158732 × 20 producing 1803174640
+ 90158732 × 700 which equals 63111112400
+ 90158732 × 9000 producing 811428588000
+ 90158732 × 10000 what gives us 901587320000
+ 90158732 × 400000 that equals 36063492800000
+ 90158732 × 7000000 what gives us 631111124000000
+ 90158732 × 80000000 that is equal 7212698560000000

= 7881651828264896
