Volume of Cylinder = Ï€(Diameter, ft)2 (Height, ft)
Take note of the formula
4
convert 84 inches in feet
84in=7ft
Ï€ (7ft)2 * 16

4 = Ï€ *49*16

4
= 3.142*12.25*16=615.832 Gallons
16.32 US gallons.16.32 US gallons.16.32 US gallons.16.32 US gallons.
885 gallons.
17,204 gallons.
About 15,293 gallons.
About 7,600 gallons
489.76 gallons of water.
66 gallons
Exactly 35.2332 gallons, but 36 to be safe.
3697 Gallons @ 80% of wall height
16.32 US gallons.16.32 US gallons.16.32 US gallons.16.32 US gallons.
Is the pool a circle? Do you want US gallons, or Imperial gallons?
885 gallons.
Depends on the depth. If it is 4 feet deep and it is cicular with a diameter of 24 feet then you have approx. 13,553 gallons of water. If it is 3 feet deep then you have approx. 10,152 gallons of water.
Assuming the dimensions given are inside dimensions, the cylinder will hold 55.75 gallons  less if the dimensions given are outside dimensions.
29.45 cubic feet or 183.45 US gallons.
This pool can hold a maximum of about 18,420 gallons of water.
21.76 US gallons of water.