Fangfang buys a box of milk and a piece of bread for breakfast every day. It is known that a box of milk costs 2.50 yuan and a piece of bread costs 1.50 yuan. Please calculate how much Fangfang spends on breakfast for a week?
芳芳每天要买一盒牛奶和一个面包当早餐，已知牛奶2.50元一盒，面包1.50元一个，请你算一下，芳芳一星期买早餐花多少钱？
<gadget id="calculator">2.5 + 1.5</gadget>
<output>4</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<result>28</result>