Planting trees every six years in spring, 380 trees survived and 20 died. What is the survival rate?
六年一班春季植树，活了380棵，死了20棵树，成活率是多少．
<gadget id="calculator">380 + 20</gadget>
<output>400</output>

<gadget id="calculator">380 / 400</gadget>
<output>19/20 = around 0.95</output>

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

<gadget id="calculator">(19/20) * 1</gadget>
<output>19/20 = around 0.95</output>

<result>19/20 = around 0.95</result>