Alright, let's work through 2505 times 2740 step by step
2505 × 2740 = 2740 × (2505)
+ 2740 × 5 which equals 13700
+ 2740 × 00 yielding 0
+ 2740 × 500 what gives us 1370000
+ 2740 × 2000 producing 5480000

= 6863700
