I have no idea, do you mean y=mx+n cause if so it's already in that form instead that fact that the 7 is supposed to be a y
4000000000000000000000^50 is the same thing. Ain't no mathematician wants to simplify that. Mathematicians are lazy. So you would leave it the way it is.
If we do this calculation :
20 * 7 days = 140 milligrams