Alright, let's work through 13887795 times 37835571 step by step
13887795 × 37835571 = 37835571 × (13887795)
+ 37835571 × 5 what gives us 189177855
+ 37835571 × 90 resulting in 3405201390
+ 37835571 × 700 which equals 26484899700
+ 37835571 × 7000 resulting in 264848997000
+ 37835571 × 80000 yielding 3026845680000
+ 37835571 × 800000 yielding 30268456800000
+ 37835571 × 3000000 what gives us 113506713000000
+ 37835571 × 10000000 yielding 378355710000000

= 525452653755945
