The answer depends on the units used for 16. It should be blindingly obvious to anybody that the answer for 16 inches and 16 centimetres will be different.
How much water do I have a 16x32 foot pool with debt of 4 foot to 6 foot
Only for a complete novice.
2.37 cubic yards of stone for every 3 inches deep it needs to be
16 gallons
16. 4x4=16. If you can't do that, then please, go back to school.
16 gallons
16 foot x 16 foot deck would be 256 square feet.
16*16 = 256 square feet
20-30 tones (200000 kg
A 16-foot circle has an area of 201.06 square feet.
16 pounds
As you did not specify a depth, I can not provide an answer.