The fifth grade planted 200 trees last year, but only 4 did not survive. What is the survival rate?
五年级去年植树200棵，只有4棵没有栽活，成活率是多少．
<gadget id="calculator">200 - 4</gadget>
<output>196</output>

<gadget id="calculator">196 / 200</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>