Xiaoming's family buys a bottle of milk and a bag of soy milk every day. The milk costs 3.50 yuan per bottle, and the soy milk costs 1.50 yuan per bag. How much does their family spend on milk and soy milk a week?
小明家每天要买一瓶牛奶和一袋豆浆，牛奶每瓶3.50元，豆浆每袋1.50元．他们家一星期买牛奶和豆浆要花多少钱？
<gadget id="calculator">3.5 + 1.5</gadget>
<output>5</output>

<gadget id="calculator">5 * 7</gadget>
<output>35</output>

<result>35</result>