Here's an easier example. Numbers 1-4, pick 3, cannot repeat, order matters. For order matters, there are 4*3*2 possibilities, or 24 possibilities. For unordered, there are only 4 possibilities.
I'll list them out, if you don't believe me.
1,2,3
1,2,4
1,3,4
2,3,4
Remember, that's the "order doesn't matter list". That's a 1:4 chance of winning vs. the 1:24 of ordered, which is simple math, 4*3*2.
I forget the formula for unordered, but do all the combos of ordered, if you don't believe 24 is the max. It is.