kg of brine containing 2% salt, and 6 kg of brine containing 1.5% salt, how much salt is in the mixed brine?
含盐2%的盐水4千克，与含盐1.5%的盐水6千克，混合后的盐水中含盐多少．
<gadget id="calculator">2 / 100</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">4 * (1/50)</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">1.5 / 100</gadget>
<output>0.015</output>

<gadget id="calculator">6 * 0.015</gadget>
<output>0.09</output>

<gadget id="calculator">(2/25) + 0.09</gadget>
<output>0.17</output>

<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">0.17 / 10</gadget>
<output>0.017</output>

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

<gadget id="calculator">0.017 * 1</gadget>
<output>0.017</output>

<result>0.017</result>