Each law holds two things still and lets the other two trade. Pick a law, move its slider, and watch the piston, the particles and the graph answer together.
| Pressure | |
| Volume | |
| Temperature | |
| Amount |
Every state here satisfies PV = nRT with R = 0.08206 L·atm/mol·K. The law you picked is just that one equation with two things nailed down.