No problem, we've got 6442 and 1290 to multiply
6442 × 1290 = 1290 × (6442)
+ 1290 × 2 resulting in 2580
+ 1290 × 40 yielding 51600
+ 1290 × 400 that equals 516000
+ 1290 × 6000 producing 7740000

= 8310180
