For algebra how do you find volume with the combined gas law-PVTk?

you take the law-PVTk and multiply it by the thingy giving you a mobober which u find the volume and Take the pvtk and divide it by four finding the square width which should be a chord at 4∞. then you take that chord and fine the sum by using the caculations ˙˙√√ç+««=gass then you look in the law book and find gas law-PVTk and get that answer and calculate it to find the § then u find the squareroot of that and u have the combined gas law-PVTk