Last year, 2,000 saplings were planted in the orchard, and 500 of them died. Another 500 trees were planted in the orchard, all of which survived. What is the survival rate of these saplings?
果园去年种植了2000棵树苗，死亡了500棵．果园又种植了500棵，全部成活．这批树苗的成活率是多少．
<gadget id="calculator">2_000 - 500</gadget>
<output>1_500</output>

<gadget id="calculator">1_500 + 500</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 + 500</gadget>
<output>2_500</output>

<gadget id="calculator">2_000 / 2_500</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>