In an assay of the type II dehydroquinase of molecular mass 18 kDa, it is found that the V_max of the enzyme is 0.0134 µmol.min^–1 when 1.8 µg enzyme is added to the assay mixture. If the K_m for the substrate is 25 µM, the k_cat/K_m ratio will be _____ ×10⁴ M^–1.s^–1.