Dad went to the hospital and bought a bottle of pills, which contained 120 pills. The doctor asked him to "take 2 pills twice a day", how many days can he take it?
爸爸到医院买了一瓶药片，里面有120片，医生要求他"一天吃2次，每次吃2片"，可以吃几天？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<result>30</result>