The school buys 6 footballs, 55 yuan each, and buys 275 yuan volleyballs. How much more does it cost to buy footballs than to buy volleyballs?
学校买6个足球，每个足球55元，再买275元排球，买足球比买排球多花多少钱？
<gadget id="calculator">55 * 6</gadget>
<output>330</output>

<gadget id="calculator">330 - 275</gadget>
<output>55</output>

<result>55</result>