Alright, let's work through 9409 times 390 step by step
9409 × 390 = 390 × (9409)
+ 390 × 9 producing 3510
+ 390 × 00 yielding 0
+ 390 × 400 which equals 156000
+ 390 × 9000 yielding 3510000

= 3669510
