There are 120 grams of 5% salt water in container A, and a certain concentration of salt water in container B. Take out 480 grams of brine from B, put it into Type A and mix it into brine with a concentration of 13%, what is the concentration of brine in container B?
甲容器中有5%的盐水120克，乙容器中有某种浓度的盐水若干．从乙中取出480克盐水，放入甲种混合成浓度为13%的盐水，则乙容器中的盐水浓度是多少
<gadget id="calculator">120 + 480</gadget>
<output>600</output>

<gadget id="calculator">13 / 100</gadget>
<output>13/100 = around 0.13</output>

<gadget id="calculator">600 * (13/100)</gadget>
<output>78</output>

<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">120 * (1/20)</gadget>
<output>6</output>

<gadget id="calculator">78 - 6</gadget>
<output>72</output>

<gadget id="calculator">72 / 480</gadget>
<output>3/20 = around 0.15</output>

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

<gadget id="calculator">(3/20) * 1</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>