If "/ " means "-", "+" means "/", "*" means "+" and "_" means "*" find the value of expression:

19/33 + 11 * 5 - 20 =

In the diagram, points d and e are marked by drawing arcs of equal size centered at b such that the arcs intersect ba and bc. then, intersecting arcs of equal size are drawn centered at points d and e. point p is located at the intersection of these arcs. based on this construction, m , and m