Cong Cong was sick, the doctor gave him a bottle of 42 tablets of medicine, and told Xiao Ming: "Take this medicine three times a day, two tablets each time." Please do the math, how many days can Congcong take this bottle of medicine?
聪聪生病了，医生给他一瓶42片的药，并告诉小明："这种药每天吃三次，每次吃2片．"请你算一算，这瓶药聪聪能吃几天？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

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

<result>7</result>