No problem, we've got 6581 and 981 to multiply
6581 × 981 = 981 × (6581)
+ 981 × 1 which equals 981
+ 981 × 80 yielding 78480
+ 981 × 500 that is equal 490500
+ 981 × 6000 what gives us 5886000

= 6455961
