I believe that a woman meteorite that smashed into the Yucatan peninsula in Mexico about 65 million years ago. There are other theory on what killed all the dinosaurs, like by volcano or tsunami, but I believe on this theory.

1/5 of 200 is 40

1/2 of 40 is 20

1/4 of 20 is 5

1/4 of 1/2 of 1/5 of 200 is:

5

2.8284271247461901

What is the total number of rooms and floors?

y^7=8

y=1.3459001926323561

(It is less than a trillionthmore than that.)

B/2*H

B=Base

H=Height