A batch of saplings were planted, 40 survived and 10 died. What is the survival rate of this batch of saplings?
栽了一批树苗，成活40棵，死亡10棵，这批树苗的成活率是多少
<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">40 / 50</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>