Hongxing Elementary School held a mathematics competition. There were 15 questions in total. 8 points were awarded for each correct answer, and 4 points were deducted for each wrong answer. Xiaoqi answered all the questions and received a total of 72 points. How many questions did he get right?
红星小学举行一次数学竞赛，共15道题，答对一题得8分，答错一题倒扣4分，小奇答了所有题，共得72分，他做对了几道题？
<gadget id="calculator">15 * 8</gadget>
<output>120</output>

<gadget id="calculator">120 - 72</gadget>
<output>48</output>

<gadget id="calculator">8 + 4</gadget>
<output>12</output>

<gadget id="calculator">48 / 12</gadget>
<output>4</output>

<gadget id="calculator">15 - 4</gadget>
<output>11</output>

<result>11</result>