The students planted trees. A total of 25 trees were planted, and 21 survived. What is the survival rate?
同学们植树，一共植了25棵树，有21棵成活，成活率是多少．
<gadget id="calculator">21 / 25</gadget>
<output>21/25 = around 0.84</output>

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

<gadget id="calculator">(21/25) * 1</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>