No problem, we've got 9091 and 1644 to multiply
9091 × 1644 = 1644 × (9091)
+ 1644 × 1 what gives us 1644
+ 1644 × 90 giving us 147960
+ 1644 × 000 resulting in 0
+ 1644 × 9000 resulting in 14796000

= 14945604
