We're going to solve 7863 multiplied by 3866
7863 × 3866 = 3866 × (7863)
+ 3866 × 3 yielding 11598
+ 3866 × 60 what gives us 231960
+ 3866 × 800 resulting in 3092800
+ 3866 × 7000 that results in 27062000

= 30398358
