No problem, we've got 1575 and 2540 to multiply
1575 × 2540 = 2540 × (1575)
+ 2540 × 5 that is equal 12700
+ 2540 × 70 that is equal 177800
+ 2540 × 500 which equals 1270000
+ 2540 × 1000 that is equal 2540000

= 4000500
