When teaching in public schools, teachers don't have to check their faith at the door before the step onto their school campus.
Explanation:
The reason behind this is the first amendment of the united states constitution. It says that the government can't and won't promote any religion, as well as guarantee that each individual at any government facility is free to exercise its faith. Only when it doesn't try to promote it. For example, one can make behave according to his or her religion but can't promote it.
The multiplication part doesn’t matter as long as you know that the whole grid makes up the 2.3 acres. All you are left to do is shade 0.4 of the whole thing. For every 10 units 4 of them will be shaded.