Alright, let's work through 1717 times 3605 step by step
1717 × 3605 = 3605 × (1717)
+ 3605 × 7 giving us 25235
+ 3605 × 10 what gives us 36050
+ 3605 × 700 giving us 2523500
+ 3605 × 1000 what gives us 3605000

= 6189785
