No problem, we've got 4821 and 4186 to multiply
4821 × 4186 = 4186 × (4821)
+ 4186 × 1 yielding 4186
+ 4186 × 20 that is equal 83720
+ 4186 × 800 that results in 3348800
+ 4186 × 4000 resulting in 16744000

= 20180706
