The survival rate of a tree planted in a school is 95%, and if 6 trees die, how many trees survived?
学校栽树，成活率是95%，死了6棵，则活了多少棵．
<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">6 / (1/20)</gadget>
<output>120</output>

<gadget id="calculator">120 - 6</gadget>
<output>114</output>

<result>114</result>