Alright, let's work through 3459 times 5708 step by step
3459 × 5708 = 5708 × (3459)
+ 5708 × 9 giving us 51372
+ 5708 × 50 giving us 285400
+ 5708 × 400 which equals 2283200
+ 5708 × 3000 yielding 17124000

= 19743972
