The survival rate of a sapling is between 75% and 80%. In order to ensure the survival of 1200 saplings, how many saplings are needed at least.
一种树苗的成活率在75%-80%之间，为了保证成活1200棵树苗，至少需要多少棵．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1_200 / (3/4)</gadget>
<output>1_600</output>

<result>1_600</result>