Alright, let's work through 7808 times 5003 step by step
7808 × 5003 = 5003 × (7808)
+ 5003 × 8 that is equal 40024
+ 5003 × 00 that is equal 0
+ 5003 × 800 resulting in 4002400
+ 5003 × 7000 producing 35021000

= 39063424
