No problem, we've got 9628 and 420 to multiply
9628 × 420 = 420 × (9628)
+ 420 × 8 that is equal 3360
+ 420 × 20 that results in 8400
+ 420 × 600 what gives us 252000
+ 420 × 9000 giving us 3780000

= 4043760
