No problem, we've got 1507 and 2505 to multiply
1507 × 2505 = 2505 × (1507)
+ 2505 × 7 which equals 17535
+ 2505 × 00 what gives us 0
+ 2505 × 500 what gives us 1252500
+ 2505 × 1000 which equals 2505000

= 3775035
