Alright, let's work through 90142460 times 81355531 step by step
90142460 × 81355531 = 81355531 × (90142460)
+ 81355531 × 0 that equals 0
+ 81355531 × 60 that results in 4881331860
+ 81355531 × 400 producing 32542212400
+ 81355531 × 2000 resulting in 162711062000
+ 81355531 × 40000 producing 3254221240000
+ 81355531 × 100000 that equals 8135553100000
+ 81355531 × 0000000 that results in 0
+ 81355531 × 90000000 what gives us 7321997790000000

= 7333587698946260
