Jiang Yeqing answered the score questions with a score rate of 65%. She made 7 mistakes in total. How many questions did she answer in total?
蒋叶青同学解答分数问题，得分率为65%，她共错了7题．她一共解答了多少题？
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">1 - (13/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">7 / (7/20)</gadget>
<output>20</output>

<result>20</result>