Given energy, calculate electrons emitted

[ill]

Homework Statement

What is the maximum number of electrons that can be freed by a burst of light whose total energy is 1.16 µJ?

Homework Equations

E=hv
v=c/$$\lambda$$

The Attempt at a Solution

I have no problem calculating frequencies and wavelengths, my issue is how can I use these numbers to relate to number of electrons emitted. Our book tells us that light with a frequency of 4.60X10^14 s^-1 or greater will cause cesium metal to emit electrons...the above frequency comes out to 1.75X10^27 meaning it will emit electrons...what I need is some equation that relates electron emission to any of the aforementioned quantities I can find.

 

[ideasrule]

Undoubtedly, the 1.16 uJ is not concentrated in a single photon; it's spread out over many photons. What frequency should the photons be so that they can liberate the maximum number of electrons?