A total of 34 people are playing on the 12 table tennis tables in the school, how many of them are playing singles?
学校的12张乒乓球台上共有34人在打球，其中进行单打的有多少张？
<gadget id="calculator">12 * 2</gadget>
<output>24</output>

<gadget id="calculator">34 - 24</gadget>
<output>10</output>

<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">12 - 5</gadget>
<output>7</output>

<result>7</result>