A forest farm planted 500 trees in spring, and the survival rate was 97%. How many trees survived?
某林场春季植树500棵，成活率为97%，成活多少棵．
<gadget id="calculator">97 / 100</gadget>
<output>97/100 = around 0.97</output>

<gadget id="calculator">500 * (97/100)</gadget>
<output>485</output>

<result>485</result>