A batch of saplings should be planted in the beautification of Minxing community, the survival rate of these saplings is 75%-80%, if the community needs to plant 240 saplings, how many should be planted at least.
闽星小区美化环境要种植一批树苗，这批树苗的成活率为75%-80%，如果小区要种活240棵树苗，那么至少应种多少棵．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">240 / (4/5)</gadget>
<output>300</output>

<result>300</result>