Alright, let's work through 1726 times 1006 step by step
1726 × 1006 = 1006 × (1726)
+ 1006 × 6 what gives us 6036
+ 1006 × 20 yielding 20120
+ 1006 × 700 giving us 704200
+ 1006 × 1000 that equals 1006000

= 1736356
