Honghong’s family wants to plant a batch of saplings. The survival rate of such saplings is generally 75%-80%. If 1000 saplings are to be planted alive, how many should be planted at least.
红红家要栽种一批树苗，这种树苗的成活率一般为75%-80%，假如要栽活1000棵树苗，那么至少应栽多少棵．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_000 / (4/5)</gadget>
<output>1_250</output>

<result>1_250</result>