There are 20 questions in total in the fifth grade, 7 points for a correct answer, 4 points for a wrong answer, and 74 points for Wang Lei, how many questions he answered correctly.
五年级开展数学竞赛，一共20题，答对一题得7分，答错一题扣4分，王磊得74分，他答对了多少题．
<gadget id="calculator">20 * 7</gadget>
<output>140</output>

<gadget id="calculator">140 - 74</gadget>
<output>66</output>

<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<gadget id="calculator">66 / 11</gadget>
<output>6</output>

<gadget id="calculator">20 - 6</gadget>
<output>14</output>

<result>14</result>