No problem, we've got 6696 and 1590 to multiply
6696 × 1590 = 1590 × (6696)
+ 1590 × 6 that equals 9540
+ 1590 × 90 resulting in 143100
+ 1590 × 600 producing 954000
+ 1590 × 6000 giving us 9540000

= 10646640
