Add 5 grams of salt and 15 grams of water to 25% salt water, what is the salt content of the salt water?
在含盐25%的盐水中，加入5克盐和15克水，这时盐水含盐率是等于多少
<gadget id="calculator">5 + 15</gadget>
<output>20</output>

<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) * 1</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>