The school planted 1,000 trees this year, but 20 died. What is the survival rate?
学校今年栽了1000棵树，死了20棵，成活率是多少
<gadget id="calculator">1_000 - 20</gadget>
<output>980</output>

<gadget id="calculator">980 / 1_000</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>