The students went to plant trees, 490 survived, and 10 failed. What is the survival rate?
同学们去植树，有490棵成活了，有10棵没成活，成活率是多少．
<gadget id="calculator">490 + 10</gadget>
<output>500</output>

<gadget id="calculator">490 / 500</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>