Alright, let's work through 10853814 times 38728042 step by step
10853814 × 38728042 = 38728042 × (10853814)
+ 38728042 × 4 what gives us 154912168
+ 38728042 × 10 that results in 387280420
+ 38728042 × 800 which equals 30982433600
+ 38728042 × 3000 yielding 116184126000
+ 38728042 × 50000 that results in 1936402100000
+ 38728042 × 800000 that results in 30982433600000
+ 38728042 × 0000000 resulting in 0
+ 38728042 × 10000000 which equals 387280420000000

= 420346964452188
