No problem, we've got 6621 and 6531 to multiply
6621 × 6531 = 6531 × (6621)
+ 6531 × 1 giving us 6531
+ 6531 × 20 yielding 130620
+ 6531 × 600 that results in 3918600
+ 6531 × 6000 that is equal 39186000

= 43241751
