So this expression under these conditions gives us the following simplified expression. And this expression is nice because here we have three unknowns. This is our unknown, this is our unknown, and this is our unknown. So if we, for example, know our cell voltage and we know our number of moles, we can rearrange this equation and solve for K in the following way. Natural log of K is equal to N times cell voltage divided by zero point 25 seven. And suppose now we know our K and we know our end.