No problem, we've got 9551 and 420 to multiply
9551 × 420 = 420 × (9551)
+ 420 × 1 what gives us 420
+ 420 × 50 which equals 21000
+ 420 × 500 that results in 210000
+ 420 × 9000 what gives us 3780000

= 4011420
