The survival rate of a tree is 85%-90%. To ensure the survival of 1530 saplings, at least how many saplings should be planted.
一种树木的成活率是85%-90%，要保证成活1530棵树苗，至少要栽多少棵．
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1_530 / (17/20)</gadget>
<output>1_800</output>

<result>1_800</result>