No problem, we've got 8199 and 420 to multiply
8199 × 420 = 420 × (8199)
+ 420 × 9 yielding 3780
+ 420 × 90 that results in 37800
+ 420 × 100 what gives us 42000
+ 420 × 8000 that is equal 3360000

= 3443580
