How many 1" square tiles are needed to tile the edge of an oval pool with dimensions 12 feet by 22 feet?

We begin by converting the dimensions to inches 
12 feet = 12*12 " = 144"
22 feet =22*12 " = 364" 
the total needed is their product: 364*144 = 52416 

we need 52416 tiles for a rectangular pool with these dimensions
but for an oval (elliptical) pool 
 
so use 41168 tiles 

:)