No problem, we've got 6644 and 3279 to multiply
6644 × 3279 = 3279 × (6644)
+ 3279 × 4 which equals 13116
+ 3279 × 40 yielding 131160
+ 3279 × 600 resulting in 1967400
+ 3279 × 6000 yielding 19674000

= 21785676
