No problem, we've got 7560 and 2880 to multiply
7560 × 2880 = 2880 × (7560)
+ 2880 × 0 resulting in 0
+ 2880 × 60 which equals 172800
+ 2880 × 500 that is equal 1440000
+ 2880 × 7000 what gives us 20160000

= 21772800
