There are 30 questions in the mathematics competition in the preparatory class of a certain school. If you answer a question correctly, you will get 5 points, if you don’t answer it, you will get 0 points, and if you answer wrong, you will be deducted 4 points. Student Xiao Wang has 5 questions that he didn’t answer, and finally got 71 points. How many points did he answer correctly? question.
某校预备班的数学竞赛共有30道题，答对一题得5分，不答得0分，答错扣4分，学生小王有5题未答，最后得了71分，那么他答对了多少题．
<gadget id="calculator">30 - 5</gadget>
<output>25</output>

<gadget id="calculator">5 * 25</gadget>
<output>125</output>

<gadget id="calculator">125 - 71</gadget>
<output>54</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">54 / 9</gadget>
<output>6</output>

<gadget id="calculator">30 - 6 - 5</gadget>
<output>19</output>

<result>19</result>