Alright, let's work through 9621 times 4154 step by step
9621 × 4154 = 4154 × (9621)
+ 4154 × 1 giving us 4154
+ 4154 × 20 that equals 83080
+ 4154 × 600 resulting in 2492400
+ 4154 × 9000 giving us 37386000

= 39965634
