Xiaohong’s family needs to buy a box of milk and a bag of soy milk every day. A box of milk is 2.4 yuan, and a bag of soy milk is 0.6 yuan. How much does it cost to buy milk and soy milk in a week?
小红家每天要买一盒牛奶和一袋豆浆，一盒牛奶2.4元，一袋豆浆0.6元，一星期买牛奶和豆浆要花多少钱？
<gadget id="calculator">2.4 + 0.6</gadget>
<output>3</output>

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

<result>21</result>