No problem, we've got 7847 and 2400 to multiply
7847 × 2400 = 2400 × (7847)
+ 2400 × 7 yielding 16800
+ 2400 × 40 which equals 96000
+ 2400 × 800 what gives us 1920000
+ 2400 × 7000 what gives us 16800000

= 18832800
