Alright, let's work through 1507 times 2577 step by step
1507 × 2577 = 2577 × (1507)
+ 2577 × 7 producing 18039
+ 2577 × 00 producing 0
+ 2577 × 500 that is equal 1288500
+ 2577 × 1000 that is equal 2577000

= 3883539
