Alright, let's work through 2403 times 3920 step by step
2403 × 3920 = 3920 × (2403)
+ 3920 × 3 that is equal 11760
+ 3920 × 00 that is equal 0
+ 3920 × 400 yielding 1568000
+ 3920 × 2000 which equals 7840000

= 9419760
