Alright, let's work through 90528391 times 90979463 step by step
90528391 × 90979463 = 90979463 × (90528391)
+ 90979463 × 1 what gives us 90979463
+ 90979463 × 90 what gives us 8188151670
+ 90979463 × 300 that equals 27293838900
+ 90979463 × 8000 that results in 727835704000
+ 90979463 × 20000 yielding 1819589260000
+ 90979463 × 500000 yielding 45489731500000
+ 90979463 × 0000000 what gives us 0
+ 90979463 × 90000000 resulting in 8188151670000000

= 8236224399434033
