No problem, we've got 3504 and 1507 to multiply
3504 × 1507 = 1507 × (3504)
+ 1507 × 4 what gives us 6028
+ 1507 × 00 that is equal 0
+ 1507 × 500 giving us 753500
+ 1507 × 3000 resulting in 4521000

= 5280528
