If 5 grams of salt is added to 20 grams of brine with a concentration of 20%, what is the concentration of the brine?
把5克盐加入浓度为20%的20克盐水中，此时盐水的浓度为多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 20</gadget>
<output>4</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">5 + 20</gadget>
<output>25</output>

<gadget id="calculator">9 / 25</gadget>
<output>9/25 = around 0.36</output>

<result>9/25 = around 0.36</result>