No problem, we've got 1031 and 3897 to multiply
1031 × 3897 = 3897 × (1031)
+ 3897 × 1 that is equal 3897
+ 3897 × 30 that equals 116910
+ 3897 × 000 giving us 0
+ 3897 × 1000 giving us 3897000

= 4017807
