If i wanted to walk 1,000,000 yards around a rectangular park that is 150 yards on one side and 125 yards on the other, how many times would i have to walk

3,636.3636 you want to add 125 and 150 then divide it by 1,000,000 

If the park is 150 yards long and 125 yards wide,
then its perimeter is

                     (150 + 125 + 150 + 125) = 550 yards .

If you want to do 1 million yards just walking around and around
the same park, you're going to get awfully bored ... you'll have to
walk all the way around the park, and not cheat or cut across it,

                       1,818 times plus another 100 yards.

If you go out and walk around the park once every night, after
you finish your homework and before you go to bed, then you'll
cross the 1,000,000-yards mark, and you never miss a single
night on account of rain or feeling lazy or snow or being sick,
then you'll cross the 999,900-yards mark exactly 1 week before
the end of the 5th year ! 

Your legs and feet will be in great shape, because you will have
walked 568 miles !

And then you'll only have another 100 yards to go.