You can find all the information you need at this website, http://www.livestrong.com/article/379539-what-is-the-difference-between-hard-ground-firm-ground-soccer-cleats/.
96.78 football fields.
24 whole fields (US, NFL) with some room left over.
3 football fields
528 American football fields.
25 football fields can fit inside the pentagon
88 football fields
22.58 American football fields.
Roughly 27 football fields
187,475.2 American football fields.
369,600 American football fields.
About 37,813 US NFL football fields.
They can be used on turf fields and can work well. The mechanism used in making many shoesÊcleats is usually the same.