Data:
Solute = NaOH
Volume of solution = 250 mL => (1 L = 1000 mL) => 250 mL = 0.250 L
Concentration = 3.0 M (mol/L)
-------------
Please, look up the molar mass of NaOH => 40 g/mol approx.
-------------
We will work with the next formula:
Molarity = moles of NaOH/volume of the solution (L)
Clear the moles of NaOH:
Molarity x volume = moles
3.0 mol/L x 0.250 L =