No problem, we've got 3893 and 1643 to multiply
3893 × 1643 = 1643 × (3893)
+ 1643 × 3 which equals 4929
+ 1643 × 90 which equals 147870
+ 1643 × 800 resulting in 1314400
+ 1643 × 3000 that equals 4929000

= 6396199
