Alright, let's work through 1277 times 8215 step by step
1277 × 8215 = 8215 × (1277)
+ 8215 × 7 that equals 57505
+ 8215 × 70 which equals 575050
+ 8215 × 200 that equals 1643000
+ 8215 × 1000 which equals 8215000

= 10490555
