The examples and descriptions on the second page are super off. For example, the first example should be described as "To create #two# fixed-height rows of 150

The examples and descriptions on the second page are super off. For example, the first example should be described as "To create #two# fixed-height rows of 150px and three fixed-width columns of 150px, simply write:" and the css for "To add a fourth column that is 70px wide, write:" should have 3 150px columns, not two.