Alright, let's work through 2509 times 1070 step by step
2509 × 1070 = 1070 × (2509)
+ 1070 × 9 giving us 9630
+ 1070 × 00 which equals 0
+ 1070 × 500 resulting in 535000
+ 1070 × 2000 that equals 2140000

= 2684630
