What is the concentration of brine after mixing 100 g of 35% brine and 25 g of 80% brine?
100克浓度为35%的盐水和25克浓度为80%的盐水混合后的盐水浓度是多少．
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">100 * (7/20)</gadget>
<output>35</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">25 * (4/5)</gadget>
<output>20</output>

<gadget id="calculator">35 + 20</gadget>
<output>55</output>

<gadget id="calculator">100 + 25</gadget>
<output>125</output>

<gadget id="calculator">55 / 125</gadget>
<output>11/25 = around 0.44</output>

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

<gadget id="calculator">(11/25) * 1</gadget>
<output>11/25 = around 0.44</output>

<result>11/25 = around 0.44</result>