No problem, we've got 6447 and 6261 to multiply
6447 × 6261 = 6261 × (6447)
+ 6261 × 7 that equals 43827
+ 6261 × 40 that is equal 250440
+ 6261 × 400 that is equal 2504400
+ 6261 × 6000 that is equal 37566000

= 40364667
