No problem, we've got 6540 and 1006 to multiply
6540 × 1006 = 1006 × (6540)
+ 1006 × 0 giving us 0
+ 1006 × 40 what gives us 40240
+ 1006 × 500 resulting in 503000
+ 1006 × 6000 what gives us 6036000

= 6579240
