If 150 pine trees are planted, 120 will survive. What is the survival rate of the pine trees?
栽150棵松树有120棵成活，松树的成活率是多少．
<gadget id="calculator">120 / 150</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>