Container A contains 8 kg of salt water containing 10% salt, and container B contains 12 kg of salt water containing 15% salt. Mix the brine from the two containers together, what is the salt content?
甲容器盛有8千克含盐10%的盐水，乙容器盛有12千克含盐15%的盐水．把两个容器的盐水混在一起，含盐率是多少？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">8 * (1/10)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">12 * (3/20)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(4/5) + (9/5)</gadget>
<output>13/5 = around 2.6</output>

<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<gadget id="calculator">(13/5) / 20</gadget>
<output>13/100 = around 0.13</output>

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

<gadget id="calculator">(13/100) * 1</gadget>
<output>13/100 = around 0.13</output>

<result>13/100 = around 0.13</result>