Calculate The Tm Annealing Calculate The Ksp For MgCO3. . . .?

Calculate the Ksp for MgCO3. . . .? - calculate the tm annealing

I have a tm chemical test and this is an example in the study guide and I do not understand how. Can you please tell me.

MgCO3, where more than solid with water at 25 degrees Celsius has been shaken thaqt dissolved 2.6 x 10 ^ -10 moles per liter. Use this information to K, for MgCO3 Calculate