The school science and technology festival held an encyclopedia knowledge contest. Zhang Li had answered 47 questions correctly and 3 wrong ones. If he wants to achieve a 95% correct answer rate, he must at least answer as many questions in a row as possible.
学校科技节举行百科知识竞赛，张力同学答题已经答对了47题，答错了3道，如果他想使自己的答题正确率达到95%，那么至少还要连续答对多少题．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">3 / (1/20)</gadget>
<output>60</output>

<gadget id="calculator">60 - 3 - 47</gadget>
<output>10</output>

<result>10</result>