Yucai Primary School held a mathematics competition, with 10 questions in total, 8 points for each correct answer, and 5 points deducted for each wrong question. Lingling finally scored 28 points. How many questions did she get right?
育才小学举行数学竞赛，共10题，每做对一题得8分，错一题扣5分．灵灵最终得28分．她做对了多少道题？
<gadget id="calculator">50 + 28</gadget>
<output>78</output>

<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<gadget id="calculator">78 / 13</gadget>
<output>6</output>

<result>6</result>