The sixth grade held a quiz with a total of 30 questions. For each correct question, 8 points will be awarded, and for each wrong answer, 4 points will be deducted. Wang Miaomiao scored 120 points. Do you know how many questions she got right?
六年级举行智力竞赛共30道题，每做对一题得8分，做错一题倒扣4分．王苗苗同学得了120分，你知道她做对了多少道题吗？
<gadget id="calculator">30 * 8</gadget>
<output>240</output>

<gadget id="calculator">240 - 120</gadget>
<output>120</output>

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

<gadget id="calculator">120 / 12</gadget>
<output>10</output>

<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<result>20</result>