Happy Park planted 480 trees last year, and the survival rate reached 95%. How many trees survived?
开心公园去年植树480棵，成活率达到95%，共成活多少棵？
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

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

<result>456</result>