Class 1, Grade 6, planted 500 trees in total, and the survival rate was 98%. How many trees did not survive?
六年级1班同学共植树500棵，成活率是98%，没有成活的树有多少棵．
<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">1 - (49/50)</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">500 * (1/50)</gadget>
<output>10</output>

<result>10</result>