Alright, let's work through 4069 times 7803 step by step
4069 × 7803 = 7803 × (4069)
+ 7803 × 9 that is equal 70227
+ 7803 × 60 which equals 468180
+ 7803 × 000 that equals 0
+ 7803 × 4000 resulting in 31212000

= 31750407
