Alright, let's work through 3975 times 213 step by step
3975 × 213 = 213 × (3975)
+ 213 × 5 resulting in 1065
+ 213 × 70 yielding 14910
+ 213 × 900 which equals 191700
+ 213 × 3000 which equals 639000

= 846675
