How many U-235 atoms consumed in a 700 MW reactor in one day?

[abrowaqas]

Homework Statement

WHen an atom of U235 undergoes fission in a statement reactor about 200MeV energy is liberated. suppose that a reactor using U235 has an output of 700MW and 20% efficient:
a) how many atoms does it consume in one day?
b) what mass of uranium does it consume daily?

Homework Equations

The Attempt at a Solution

No any idea for this question ?

 

[6Stang7]

For starts, what units to have, and what units do you need to solve for? What is an MeV? What are MWs?