Alright, let's work through 2403 times 9975 step by step
2403 × 9975 = 9975 × (2403)
+ 9975 × 3 giving us 29925
+ 9975 × 00 giving us 0
+ 9975 × 400 which equals 3990000
+ 9975 × 2000 yielding 19950000

= 23969925
