--- Part Two ---

Time to check the rest of the slopes - you need to minimize the probability of a sudden arboreal
stop, after all.

Determine the number of trees you would encounter if, for each of the following slopes, you start at
the top-left corner and traverse the map all the way to the bottom:

- Right 1, down 1. - Right 3, down 1. (This is the slope you already checked.) - Right 5, down 1. -
Right 7, down 1. - Right 1, down 2.

In the above example, these slopes would find 2, 7, 3, 4, and 2 tree(s) respectively; multiplied
together, these produce the answer 336.

What do you get if you multiply together the number of trees encountered on each of the
listed slopes?