No problem, we've got 4031 and 2505 to multiply
4031 × 2505 = 2505 × (4031)
+ 2505 × 1 which equals 2505
+ 2505 × 30 giving us 75150
+ 2505 × 000 that equals 0
+ 2505 × 4000 that equals 10020000

= 10097655
