Alright, let's work through 1707 times 1647 step by step
1707 × 1647 = 1647 × (1707)
+ 1647 × 7 yielding 11529
+ 1647 × 00 that results in 0
+ 1647 × 700 which equals 1152900
+ 1647 × 1000 producing 1647000

= 2811429
