box of milk is 2.4 yuan, and a bag of soy milk is 0.8 yuan. Xiao Ming’s family needs to buy a carton of milk and a bag of soy milk every day. How much does it cost to buy milk and soy milk in a week?
一盒牛奶2.4元，一袋豆浆0.8元．小明家每天要买一盒牛奶和一袋豆浆，一个星期买牛奶和豆浆一共要花多少钱？
<gadget id="calculator">2.4 + 0.8</gadget>
<output>3.2</output>

<gadget id="calculator">3.2 * 7</gadget>
<output>22.4</output>

<result>22.4</result>