No problem, we've got 6398 and 6448 to multiply
6398 × 6448 = 6448 × (6398)
+ 6448 × 8 giving us 51584
+ 6448 × 90 yielding 580320
+ 6448 × 300 what gives us 1934400
+ 6448 × 6000 producing 38688000

= 41254304
