No problem, we've got 1644 and 2086 to multiply
1644 × 2086 = 2086 × (1644)
+ 2086 × 4 that results in 8344
+ 2086 × 40 giving us 83440
+ 2086 × 600 that equals 1251600
+ 2086 × 1000 that results in 2086000

= 3429384
