Cong Cong participated in the "Chinese Character Conference" competition of the whole school. He got 10 points for a correct answer and 6 points for a wrong answer. Cong Cong answered a total of 9 questions and scored 58 points in the end. How many questions did Congcong answer correctly?
聪聪参加全校"汉字大会"比赛，答对一题加10分，答错一题扣6分，聪聪共抢答9题，最后得分58分．聪聪答对了多少题．
<gadget id="calculator">9 * 10</gadget>
<output>90</output>

<gadget id="calculator">90 - 58</gadget>
<output>32</output>

<gadget id="calculator">10 + 6</gadget>
<output>16</output>

<gadget id="calculator">32 / 16</gadget>
<output>2</output>

<gadget id="calculator">9 - 2</gadget>
<output>7</output>

<result>7</result>