The forest farm planted 500 saplings in spring, and the survival rate was 98%. How many saplings survived?
林场春天种500棵树苗，成活率为98%，成活了多少棵？
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">500 * (49/50)</gadget>
<output>490</output>

<result>490</result>