No problem, we've got 3643 and 9840 to multiply
3643 × 9840 = 9840 × (3643)
+ 9840 × 3 giving us 29520
+ 9840 × 40 giving us 393600
+ 9840 × 600 that equals 5904000
+ 9840 × 3000 that is equal 29520000

= 35847120
