No problem, we've got 9580 and 644 to multiply
9580 × 644 = 644 × (9580)
+ 644 × 0 what gives us 0
+ 644 × 80 which equals 51520
+ 644 × 500 that is equal 322000
+ 644 × 9000 yielding 5796000

= 6169520
