If 200 poplar trees are planted, 10 will not survive. What is the survival rate?
种200棵杨树，有10棵没有活，成活率是多少．
<gadget id="calculator">200 - 10</gadget>
<output>190</output>

<gadget id="calculator">190 / 200</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>