Alright, let's work through 90113746 times 39985779 step by step
90113746 × 39985779 = 39985779 × (90113746)
+ 39985779 × 6 what gives us 239914674
+ 39985779 × 40 giving us 1599431160
+ 39985779 × 700 that equals 27990045300
+ 39985779 × 3000 yielding 119957337000
+ 39985779 × 10000 what gives us 399857790000
+ 39985779 × 100000 what gives us 3998577900000
+ 39985779 × 0000000 that results in 0
+ 39985779 × 90000000 producing 3598720110000000

= 3603268332418134
