The school planted 490 trees in spring and 10 died. What is the survival rate?
学校春季植树活了490棵，死了10棵，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>