The reaction of ethyl acetate with sodium hydroxide,
CH3COOC2H5(aq) + NaOH(aq) ⇌ CH3COONa(aq) + C2H5OH(aq)
is first order in CH3COOC2H5 and first order in NaOH. If the concentration of CH3COOC2H5 was increased by half and the concentration of NaOH was quadrupled, by what factor would the reaction rate increase?
Express your answer numerically.