Sixth grade math competition. There are 20 questions in total, and it is stipulated that 6 points will be awarded for each correct answer, and 2 points will be deducted for wrong or non-answered questions. Wang Hong finally scored 80 points. How many questions did he get right?
六年级举行数学竞赛．共有20道题，规定做对一道得6分，做错或不做倒扣2分，王宏最后得了80分，他做对了几道题？
<gadget id="calculator">20 * 6</gadget>
<output>120</output>

<gadget id="calculator">120 - 80</gadget>
<output>40</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<result>15</result>