The school holds a popular science knowledge contest. Xiao Ming has answered 26 questions correctly and 6 questions wrong. He has to answer at least as many questions in a row to make his correct answer rate reach 85%.
学校举行科普知识竞赛，小明已经答对了26道题，答错了6道，他至少还要连续答对多少道题，就能使自己的答题正确率达到85%．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">6 / (3/20)</gadget>
<output>40</output>

<gadget id="calculator">40 - 26 - 6</gadget>
<output>8</output>

<result>8</result>