No problem, we've got 4239 and 2400 to multiply
4239 × 2400 = 2400 × (4239)
+ 2400 × 9 producing 21600
+ 2400 × 30 giving us 72000
+ 2400 × 200 that equals 480000
+ 2400 × 4000 which equals 9600000

= 10173600
