No problem, we've got 7721 and 2800 to multiply
7721 × 2800 = 2800 × (7721)
+ 2800 × 1 which equals 2800
+ 2800 × 20 what gives us 56000
+ 2800 × 700 yielding 1960000
+ 2800 × 7000 what gives us 19600000

= 21618800
