Mix 2 kg of 52% alcohol with 3 kg of 38% alcohol and find the concentration after mixing.
把2千克浓度为52%的酒与3千克浓度为38%的酒混合，求混合后的浓度．
<gadget id="calculator">52 / 100</gadget>
<output>13/25 = around 0.52</output>

<gadget id="calculator">(13/25) * 2</gadget>
<output>26/25 = around 1.04</output>

<gadget id="calculator">38 / 100</gadget>
<output>19/50 = around 0.38</output>

<gadget id="calculator">(19/50) * 3</gadget>
<output>57/50 = around 1.14</output>

<gadget id="calculator">(26/25) + (57/50)</gadget>
<output>109/50 = around 2.18</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">(109/50) / 5</gadget>
<output>109/250 = around 0.436</output>

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

<gadget id="calculator">(109/250) * 1</gadget>
<output>109/250 = around 0.436</output>

<result>109/250 = around 0.436</result>