Having math conversion issues. Can you help?

Having math conversion issues. Can you help? Give cycler 45 mg/kg/day p.o. in 3 divided doses for a patient who weighs 66 pounds. A 75 mL stock medication is labeled Ceclor 125 mg.mL. How many mL would the nurse administer per dose? (must show work) I just the long "cross out" method