Alright, let's work through 90950087 times 91444721 step by step
90950087 × 91444721 = 91444721 × (90950087)
+ 91444721 × 7 giving us 640113047
+ 91444721 × 80 giving us 7315577680
+ 91444721 × 000 resulting in 0
+ 91444721 × 0000 that results in 0
+ 91444721 × 50000 what gives us 4572236050000
+ 91444721 × 900000 which equals 82300248900000
+ 91444721 × 0000000 giving us 0
+ 91444721 × 90000000 yielding 8230024890000000

= 8316905330640727
