In order to green the city, a certain street needs to plant a batch of saplings. The survival rate of these saplings is 75%-80%. If you want to plant 1200 saplings alive, at least how many saplings should be planted.
为绿化城市，某街道要栽种一批树苗，这批树苗的成活率是75%-80%．如果要栽活1200棵树苗，至少要栽种多少棵．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1_200 / (4/5)</gadget>
<output>1_500</output>

<result>1_500</result>