112 cuft
144
About 21 cubic feet
As you did not specify a depth, I can not provide an answer.
42.4 cubic feet = 1.6 cubic yards (rounded)
Assuming the units for the three measures are the same, you need 14400 cubic units.
18 cu. ft
you need 3,072 cubic feet of soil
You need to specify how deep the area is to answer the question; this is a volume problem. Please ask again
To calculate the volume of dirt needed to fill a circular area, you first need to find the area of the circle (πr^2, where r is the radius). In this case, for a 14-foot circle, the radius is 7 feet. Once you find the area, you can calculate the volume of dirt needed based on the desired depth of filling the circle.
If you want to paint a place, carpet it, plant wheat on it, water it, mow it, pave it, or cover it with cloth, then you need to know what its surface area is. If you want to fill a place with water or beer, or pretty much fill any container with anything, then you need to know what its volume is.
You need 13 yrd's of fill