How do I calculate the mass of precipitation formed?

Jan 2020
Kathmandu, Nepal
The question says "The solubility product constant (Ksp) of Ca(OH)2 at 25C is 4.42 x 10^(-5). A 500 ml of saturated solution of Ca(OH)2 is mixed with an equal volume of 0.4M NaOH. What mass of Ca(OH)2 is precipitated out?"

I have been really stuck in this question for a while. Any help will be appreciated :)
Apr 2015
Can you state the equation for the solubility product of calcium hydroxide?

Hint :This should include a the concentration of the hydroxyl ion.

What happens to this concentration when you add the sodium hydroxide?