No problem, we've got 6239 and 1691 to multiply
6239 × 1691 = 1691 × (6239)
+ 1691 × 9 what gives us 15219
+ 1691 × 30 resulting in 50730
+ 1691 × 200 which equals 338200
+ 1691 × 6000 that results in 10146000

= 10550149
