Alright, let's work through 9904 times 5850 step by step
9904 × 5850 = 5850 × (9904)
+ 5850 × 4 that is equal 23400
+ 5850 × 00 that is equal 0
+ 5850 × 900 which equals 5265000
+ 5850 × 9000 giving us 52650000

= 57938400
