Alright, let's work through 1391 times 9038 step by step
1391 × 9038 = 9038 × (1391)
+ 9038 × 1 yielding 9038
+ 9038 × 90 that is equal 813420
+ 9038 × 300 that results in 2711400
+ 9038 × 1000 giving us 9038000

= 12571858
