If 200 trees are planted and 2 die, what is the survival rate?
种200棵树，死2棵，成活率是多少．
<gadget id="calculator">200 - 2</gadget>
<output>198</output>

<gadget id="calculator">198 / 200</gadget>
<output>99/100 = around 0.99</output>

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

<gadget id="calculator">(99/100) * 1</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>