A student has 4 fifths gallons of popcorn to give away. He wants to split it evenly between his 7 friends. How much popcorn does each friend receive?

4/5 * 1/7 = 4/35 of a gallon

He wants to split it evenly between his 7 friends.

That should be "... split it evenly among his 7 friends."

When there are two, use between.

When more than two, use among.

You learn more than math here.