80 grams of sugar water with a concentration of 5%, 20 grams of sugar water with a concentration of 8%, and the two kinds of sugar water are mixed together, what is the concentration?
浓度为5%的糖水80克，浓度为8%的糖水20克，两种糖水混合在一起，浓度是多少？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">80 * (1/20)</gadget>
<output>4</output>

<gadget id="calculator">8 / 100</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">20 * (2/25)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">4 + (8/5)</gadget>
<output>28/5 = around 5.6</output>

<gadget id="calculator">80 + 20</gadget>
<output>100</output>

<gadget id="calculator">(28/5) / 100</gadget>
<output>7/125 = around 0.056</output>

<result>7/125 = around 0.056</result>