Alright, let's work through 1260 times 8191 step by step
1260 × 8191 = 8191 × (1260)
+ 8191 × 0 that equals 0
+ 8191 × 60 which equals 491460
+ 8191 × 200 what gives us 1638200
+ 8191 × 1000 that results in 8191000

= 10320660
