We're going to solve 3870 multiplied by 5251
3870 × 5251 = 5251 × (3870)
+ 5251 × 0 what gives us 0
+ 5251 × 70 what gives us 367570
+ 5251 × 800 yielding 4200800
+ 5251 × 3000 that equals 15753000

= 20321370
