Alright, let's work through 40154274 times 99107387 step by step
40154274 × 99107387 = 99107387 × (40154274)
+ 99107387 × 4 that is equal 396429548
+ 99107387 × 70 yielding 6937517090
+ 99107387 × 200 yielding 19821477400
+ 99107387 × 4000 that is equal 396429548000
+ 99107387 × 50000 which equals 4955369350000
+ 99107387 × 100000 that equals 9910738700000
+ 99107387 × 0000000 that results in 0
+ 99107387 × 40000000 giving us 3964295480000000

= 3979585173022038
