After adding 20 grams of salt to 100 grams of 10% salt water, what is the percentage of salt in the salt water?
在100克含盐10%的盐水中加入20克盐后，盐占盐水的多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">100 * (1/10)</gadget>
<output>10</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">30 / 120</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>