Alright, let's work through 6478 times 3857 step by step
6478 × 3857 = 3857 × (6478)
+ 3857 × 8 that equals 30856
+ 3857 × 70 that equals 269990
+ 3857 × 400 that is equal 1542800
+ 3857 × 6000 which equals 23142000

= 24985646
