No problem, we've got 6581 and 3240 to multiply
6581 × 3240 = 3240 × (6581)
+ 3240 × 1 that equals 3240
+ 3240 × 80 that is equal 259200
+ 3240 × 500 giving us 1620000
+ 3240 × 6000 yielding 19440000

= 21322440
