No problem, we've got 9643 and 7620 to multiply
9643 × 7620 = 7620 × (9643)
+ 7620 × 3 which equals 22860
+ 7620 × 40 giving us 304800
+ 7620 × 600 that is equal 4572000
+ 7620 × 9000 resulting in 68580000

= 73479660
