No problem, we've got 6640 and 2371 to multiply
6640 × 2371 = 2371 × (6640)
+ 2371 × 0 which equals 0
+ 2371 × 40 giving us 94840
+ 2371 × 600 resulting in 1422600
+ 2371 × 6000 that results in 14226000

= 15743440
