During a tree planting activity in Happy Community, a total of 487 trees survived and 13 died. What is the survival rate of the tree in this activity?
幸福社区在一次植树活动中，一共成活487棵，死了13棵．这次活动中，树的成活率是多少？
<gadget id="calculator">487 + 13</gadget>
<output>500</output>

<gadget id="calculator">487 / 500</gadget>
<output>487/500 = around 0.974</output>

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

<gadget id="calculator">(487/500) * 1</gadget>
<output>487/500 = around 0.974</output>

<result>487/500 = around 0.974</result>