Alright, let's work through 40138847 times 55455642 step by step
40138847 × 55455642 = 55455642 × (40138847)
+ 55455642 × 7 what gives us 388189494
+ 55455642 × 40 what gives us 2218225680
+ 55455642 × 800 yielding 44364513600
+ 55455642 × 8000 what gives us 443645136000
+ 55455642 × 30000 giving us 1663669260000
+ 55455642 × 100000 that equals 5545564200000
+ 55455642 × 0000000 that results in 0
+ 55455642 × 40000000 yielding 2218225680000000

= 2225925529524774
