How do you calculate fission product rate from neutron flux and yield%?

[nerdgirl]

Homework Statement

How do you calculate the rate at which atoms of a fission product are being produced directly if you are only given the thermal neutron flux and the radionuclide's fission yield% ?

Homework Equations

The Attempt at a Solution

I know the # of atoms of 235U but I am stuck

 

[lanedance]

can you relate the neutron flux to the production rate of neutrons & then the fission products production rate?