Guangming Primary School buys 5 footballs and 5 volleyballs each. It is known that a football is 55 yuan and a volleyball is 42 yuan. How much more does it cost to buy a football than a volleyball?
光明小学买足球、排球各5个．已知一个足球55元，一个排球42元．买足球比买排球多用多少元？
<gadget id="calculator">55 * 5</gadget>
<output>275</output>

<gadget id="calculator">42 * 5</gadget>
<output>210</output>

<gadget id="calculator">275 - 210</gadget>
<output>65</output>

<result>65</result>