Alright, let's work through 99901742 times 99297253 step by step
99901742 × 99297253 = 99297253 × (99901742)
+ 99297253 × 2 that is equal 198594506
+ 99297253 × 40 yielding 3971890120
+ 99297253 × 700 that is equal 69508077100
+ 99297253 × 1000 producing 99297253000
+ 99297253 × 00000 which equals 0
+ 99297253 × 900000 resulting in 89367527700000
+ 99297253 × 9000000 which equals 893675277000000
+ 99297253 × 90000000 that results in 8936752770000000

= 9919968550514726
