Add 2 grams of salt and 18 grams of water to salt water with a salt content of 10%, what is the content of the salt water at this time?
在含盐率是10%的盐水中加入2克盐、18克水，这时盐水的含率是多少
<gadget id="calculator">2 + 18</gadget>
<output>20</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) * 1</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>