A quick-answer competition, the rule is: 20 points for a correct answer, 16 points for a wrong answer. Xiao Ming scored 140 points for answering 16 questions. How many questions did he answer correctly?
一次抢答比赛，规则是：答对一题得20分，答错一题扣16分．小明答16题得140分，他答对几题？
<gadget id="calculator">16 * 20</gadget>
<output>320</output>

<gadget id="calculator">320 - 140</gadget>
<output>180</output>

<gadget id="calculator">20 + 16</gadget>
<output>36</output>

<gadget id="calculator">180 / 36</gadget>
<output>5</output>

<gadget id="calculator">16 - 5</gadget>
<output>11</output>

<result>11</result>