The survival rate of fir trees is 95%. This year, 285 trees were planted on Arbor Day. How many trees were planted in total?
杉树的成活率是95%，今年植树节植树成活了285棵，求一共植了多少棵树？
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">285 / (19/20)</gadget>
<output>300</output>

<result>300</result>