Alright, let's work through 9904 times 5900 step by step
9904 × 5900 = 5900 × (9904)
+ 5900 × 4 yielding 23600
+ 5900 × 00 that is equal 0
+ 5900 × 900 which equals 5310000
+ 5900 × 9000 which equals 53100000

= 58433600
