Plant a batch of saplings. The survival rate of such saplings is generally 80% to 90%. If 3000 saplings are to be ensured to survive, then at least how many saplings should be planted.
种一批树苗，这种树苗的成活率一般为80%～90%，如果要确保3000棵树苗成活，那么至少应栽多少棵树苗．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3_000 / (4/5)</gadget>
<output>3_750</output>

<result>3_750</result>