Alright, let's work through 9015 times 1390 step by step
9015 × 1390 = 1390 × (9015)
+ 1390 × 5 which equals 6950
+ 1390 × 10 which equals 13900
+ 1390 × 000 giving us 0
+ 1390 × 9000 what gives us 12510000

= 12530850
