The school sports team bought 7 footballs and 7 basketballs each. A football costs 55 yuan and a basketball costs 49 yuan. How much more does it cost to buy a football than to buy a basketball?
学校体育组买来足球、篮球各7个，一个足球55元，一个篮球49元，买足球比买篮球多用多少元？
<gadget id="calculator">55 - 49</gadget>
<output>6</output>

<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<result>42</result>