And so now we replace this with the Maclus constant and that is equal to this entire quantity here. And finally, if we take this and we rearrange it and solve for the Es concentration, we bring this here and Km to the bottom, we get the following equation. Let's call this equation two. So the concentration of the enzyme substrate complex is equal to the product of these two concentrations divided by the Mikaela's constant. Now, what was the entire point of getting equation two? Well, the point was to take equation one and replace the enzyme substrate concentration in terms of these quantities, where now we have the Km term and we'll see why the Km term will become important in just a moment.