Alright, let's work through 1535 times 7909 step by step
1535 × 7909 = 7909 × (1535)
+ 7909 × 5 that equals 39545
+ 7909 × 30 that equals 237270
+ 7909 × 500 yielding 3954500
+ 7909 × 1000 that equals 7909000

= 12140315
