768
If it's the dimensions of a rectangle then by using Pythagoras' theorem its diagonal is 40
since 144 is 122 you can find the primefactorization easy by noting that 12=22 x3 so 144=24x32
A 24x32 patio stone typically weighs between 60 to 100 pounds, depending on its thickness and the material it's made from, such as concrete or natural stone. Thicker stones or those made from denser materials will generally be on the heavier end of that range. Always check specific product details for accurate weight information.
If those numbers are feet, just multiply them to get the square feet. If they are some other unit, convert them to feet first.