If 400 saplings are planted, 10 of them do not survive. What is the survival rate?
种400棵树苗，有10棵没有成活，成活率是多少．
<gadget id="calculator">400 - 10</gadget>
<output>390</output>

<gadget id="calculator">390 / 400</gadget>
<output>39/40 = around 0.975</output>

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

<gadget id="calculator">(39/40) * 1</gadget>
<output>39/40 = around 0.975</output>

<result>39/40 = around 0.975</result>