Alright, let's work through 3975 times 6311 step by step
3975 × 6311 = 6311 × (3975)
+ 6311 × 5 producing 31555
+ 6311 × 70 resulting in 441770
+ 6311 × 900 producing 5679900
+ 6311 × 3000 giving us 18933000

= 25086225
