x* 1/4=y* 1/7
therefore
x=y*4/7
The total area of this park is
s=y+y*4/7
=y* 1 1/7
By knowing the area of any shape, we can find the area of another shape.
The circular area is
y=s*7/ 1 1
Square area
x=s*4/ 1 1