Alright, let's work through 3251 times 8413 step by step
3251 × 8413 = 8413 × (3251)
+ 8413 × 1 that equals 8413
+ 8413 × 50 which equals 420650
+ 8413 × 200 yielding 1682600
+ 8413 × 3000 what gives us 25239000

= 27350663
