⚛ ☢ ⚛ ☢ ⚛ ☢ ⚛
Given the frequency F of a photon in giga hertz.
Find energy E of this photon in giga electron volts.
Assume h, Planck's constant is about 4 femto electron-volt-second.
To maximize benefits, it may help not looking at the Test Suite before trying any solution!
For more info: https://en.wikipedia.org/wiki/Planck_constant