The survival rate of saplings planted on Arbor Day this year is 95%, and 456 survived. How many trees were planted?
今年植树节植的树苗成活率是95%，成活了456棵，植树多少棵．
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">456 / (19/20)</gadget>
<output>480</output>

<result>480</result>