No problem, we've got 6404 and 6441 to multiply
6404 × 6441 = 6441 × (6404)
+ 6441 × 4 giving us 25764
+ 6441 × 00 producing 0
+ 6441 × 400 yielding 2576400
+ 6441 × 6000 yielding 38646000

= 41248164
