Alright, let's work through 8630 times 3643 step by step
8630 × 3643 = 3643 × (8630)
+ 3643 × 0 giving us 0
+ 3643 × 30 resulting in 109290
+ 3643 × 600 that is equal 2185800
+ 3643 × 8000 that equals 29144000

= 31439090
