Help please

[carlobellina]

How many gallons is my corner Pentagon fishtank? Measurements of the 5 panels are 22"×22"×13"×13"×13" and it's 24" deep. Thanks for the help!

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[Munroco]

LOL, any mathematicians here, I don't have a clue how to work that out

 

[Essjay]

There are on-line calculators for working out the volume of variously shaped tanks.

Corner pentagons:
http://reef.diesyst.com/volcalc/volcalc.html
http://www.theaquatools.com/volume-calculator