Concentration

A 0.50 mol/dm³ solution of hydrochloric acid reacts completely with sodium hydroxide according to the equation:
$$\text{HCl} + \text{NaOH} \rightarrow \text{NaCl} + \text{H}_2\text{O}$$
What volume of the acid is needed to react with 25.0 cm³ of 0.50 mol/dm³ sodium hydroxide?