Qianjin Primary School held a math competition with 15 questions in total. 8 points are awarded for each correct question, and 4 points are deducted for each wrong answer. Xiao Gang scored 72 points. How many questions did he get right?
前进小学举行了一场数学竞赛，试题共15道．每做对1题得8分，每做错1题倒扣4分，小刚得了72分，他做对了几道题？
<gadget id="calculator">8 * 15</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>