Alright, let's work through 90020408 times 98015012 step by step
90020408 × 98015012 = 98015012 × (90020408)
+ 98015012 × 8 resulting in 784120096
+ 98015012 × 00 which equals 0
+ 98015012 × 400 which equals 39206004800
+ 98015012 × 0000 what gives us 0
+ 98015012 × 20000 that equals 1960300240000
+ 98015012 × 000000 producing 0
+ 98015012 × 0000000 which equals 0
+ 98015012 × 90000000 giving us 8821351080000000

= 8823351370364896
