There are 6 bottles of mango juice in a box, and the total is 42 yuan. How much does Xiaoliang need to pay for 3 bottles of mango juice?
一箱芒果汁饮料有6瓶，共42元，小亮买3瓶芒果汁饮料，需要付多少钱？
<gadget id="calculator">42 / 6</gadget>
<output>7</output>

<gadget id="calculator">7 * 3</gadget>
<output>21</output>

<result>21</result>