Alright, let's work through 90120202 times 55441721 step by step
90120202 × 55441721 = 55441721 × (90120202)
+ 55441721 × 2 giving us 110883442
+ 55441721 × 00 that results in 0
+ 55441721 × 200 that results in 11088344200
+ 55441721 × 0000 what gives us 0
+ 55441721 × 20000 that equals 1108834420000
+ 55441721 × 100000 what gives us 5544172100000
+ 55441721 × 0000000 producing 0
+ 55441721 × 90000000 what gives us 4989754890000000

= 4996419095747642
