Alright, let's work through 8906 times 1387 step by step
8906 × 1387 = 1387 × (8906)
+ 1387 × 6 which equals 8322
+ 1387 × 00 that equals 0
+ 1387 × 900 that results in 1248300
+ 1387 × 8000 that is equal 11096000

= 12352622
