No problem, we've got 3539 and 1839 to multiply
3539 × 1839 = 1839 × (3539)
+ 1839 × 9 that is equal 16551
+ 1839 × 30 resulting in 55170
+ 1839 × 500 which equals 919500
+ 1839 × 3000 which equals 5517000

= 6508221
