We're going to solve 7821 multiplied by 3781
7821 × 3781 = 3781 × (7821)
+ 3781 × 1 giving us 3781
+ 3781 × 20 yielding 75620
+ 3781 × 800 yielding 3024800
+ 3781 × 7000 that results in 26467000

= 29571201
