Teacher Wang had a cold and bought a 600ml bottle of "pharyngitis mixture". The usage and dosage stated: Shake well and take it orally, 2-3 times a day, 30-50ml each time.
王老师感冒，买了一瓶600ml的"咽炎合剂"，用法用量中写道：摇匀口服，每日2-3次，每次30-50ml，这瓶药最多够王老师服多少天．
<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<gadget id="calculator">600 / 60</gadget>
<output>10</output>

<result>10</result>