Alright, let's work through 1239 times 1128 step by step
1239 × 1128 = 1128 × (1239)
+ 1128 × 9 giving us 10152
+ 1128 × 30 that is equal 33840
+ 1128 × 200 what gives us 225600
+ 1128 × 1000 producing 1128000

= 1397592
