number of moles = molar concentration x volume(dm3)
molar concentration(C) = 0.25mol/dm3, volume = ? and number of mole(n) = massmolarmass = 6.556 ( where 56g/mol = molar mass of KOH)
6.556 = 0.25 x V
V = 0.116070.25 = 0.46428dm^3 → 464.3cm^3