No problem, we've got 6891 and 3157 to multiply
6891 × 3157 = 3157 × (6891)
+ 3157 × 1 resulting in 3157
+ 3157 × 90 resulting in 284130
+ 3157 × 800 that equals 2525600
+ 3157 × 6000 which equals 18942000

= 21754887
