There are 25 questions in a certain competition, and it is stipulated that 8 points will be awarded for each correct question, and 4 points will be deducted for each incorrect or non-answered question. Xiao Ming scored 128 points in this competition, so how many questions did he get right?
某次竞赛共有25道题，规定做对一题得8分，做错或不做一题倒扣4分．此次竞赛小明得了128分，那么，他做对了多少道题．
<gadget id="calculator">25 * 8</gadget>
<output>200</output>

<gadget id="calculator">200 - 128</gadget>
<output>72</output>

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

<gadget id="calculator">72 / 12</gadget>
<output>6</output>

<gadget id="calculator">25 - 6</gadget>
<output>19</output>

<result>19</result>