One sixth of a right angle as a degrees

Problem melissa is her dad build a walkway in their backyard. the walkway will be 54 feet long and 1.5 feet wide. the local hardware store sells tiles which are 1.5 by 1.5 feet and come in boxes of 12. how many boxes of tiles do they need?

Atemperature of 1.64◦f corresponds to answer in units of ◦c.

Answer! if you don’t mind, can you explain