The survival rate of one kind of sapling is 97%. Now to ensure the survival of 485 saplings, at least how many saplings should be planted.
一种树苗的成活率是97%，现在要保证485棵树苗成活，至少要栽多少棵树苗．
<gadget id="calculator">97 / 100</gadget>
<output>97/100 = around 0.97</output>

<gadget id="calculator">485 / (97/100)</gadget>
<output>500</output>

<result>500</result>