The beverage store launched a promotion, buy five orange juice and get two free. Now there are 42 students in class 3 and 1 who want a bottle of orange juice. How much do you need to pay for the bottle?
饮料店开展促销活动，橘子汁买五送二，现在有三1班42个同学每人要一瓶橘子汁，需付多少瓶钱就可以买到？
<gadget id="calculator">5 + 2</gadget>
<output>7</output>

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

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<result>30</result>