No problem, we've got 9142 and 2400 to multiply
9142 × 2400 = 2400 × (9142)
+ 2400 × 2 producing 4800
+ 2400 × 40 giving us 96000
+ 2400 × 100 what gives us 240000
+ 2400 × 9000 yielding 21600000

= 21940800
