Mix 20 kg of brine with 14% salt content and 30 kg of brine with 30% salt content, what is the salt content of the brine?
把含盐14%的盐水20千克，和含盐30%的盐水30千克混合在一起，这时盐水的含盐率是多少？
<gadget id="calculator">14 / 100</gadget>
<output>7/50 = around 0.14</output>

<gadget id="calculator">20 * (7/50)</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">30 * (3/10)</gadget>
<output>9</output>

<gadget id="calculator">(14/5) + 9</gadget>
<output>59/5 = around 11.8</output>

<gadget id="calculator">20 + 30</gadget>
<output>50</output>

<gadget id="calculator">(59/5) / 50</gadget>
<output>59/250 = around 0.236</output>

<result>59/250 = around 0.236</result>