No problem, we've got 1575 and 7887 to multiply
1575 × 7887 = 7887 × (1575)
+ 7887 × 5 that results in 39435
+ 7887 × 70 what gives us 552090
+ 7887 × 500 that is equal 3943500
+ 7887 × 1000 that is equal 7887000

= 12422025
