Dangdang answered 8 questions in a competition and scored 64 points. The rules of the competition are 10 points for each correct answer and 6 points for a wrong answer. How many questions Dangdang answered correctly.
铛铛在一次抢答比赛中共抢答了8道题，得64分，比赛规则是答对一题加10分，答错一题扣6分，铛铛答对了多少道题．
<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<gadget id="calculator">80 - 64</gadget>
<output>16</output>

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

<gadget id="calculator">16 / 16</gadget>
<output>1</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<result>7</result>