There are 42 tablets in a bottle of medicine. Zhang Ying eats 3 times a day, 2 tablets each time. How many days is this bottle of medicine enough for?
一瓶药有42片张英每天吃3次，每次吃2片．这瓶药够吃几天？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<result>7</result>