Xiaomao participated in the mathematics competition. He did 20 questions in total and scored 67 points. He knew that he got 5 points if he got one right, and 0 points if he didn’t do it right. ． How many questions did Xiao Mao get right?
小毛参加数学竞赛，共做20道题，得67分，已知做对一道得5分，不做得0分，错一题扣1分，又知道他做错的题和没做的一样多．问小毛做对几道题？
<gadget id="calculator">5 * 20</gadget>
<output>100</output>

<gadget id="calculator">100 - 67</gadget>
<output>33</output>

<gadget id="calculator">5 + 0.5</gadget>
<output>5.5</output>

<gadget id="calculator">33 / 5.5</gadget>
<output>6</output>

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

<result>14</result>