No problem, we've got 4001 and 1859 to multiply
4001 × 1859 = 1859 × (4001)
+ 1859 × 1 which equals 1859
+ 1859 × 00 resulting in 0
+ 1859 × 000 what gives us 0
+ 1859 × 4000 giving us 7436000

= 7437859
