All fractions are created using the equalities from the fact sheet. In order to solve this you will have to switch units systems. The conversion to remember when switching between the British customary system and the S.I. system is
2.54 cm = 1 inch
Start the set up with the distance you are given, 17 football fields, and convert to inches then cross over to the metric system.
To solve this on a graphing calculator you would put all the number in numerator in parenthesis and divide it by all the numbers in the demonstrator in parenthesis. Your graphing calculator screen would look something like this: