Xiao Ming participates in the quick-answer contest, and gets 10 points for a correct answer, and 6 points for a wrong answer. He answered 8 questions in total and scored 64 points in the end. How many questions did he get right?
小明参加抢答题比赛，答对一题加10分，答错一题扣6分．他共抢答8题，最后得分64分．他答对几题？
<gadget id="calculator">10 * 8</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>