An alcoholic solution is made by mixing 80 grams of alcohol and 20 grams of water. How much alcohol is contained in this alcoholic solution?
一种酒精溶液由80克酒精和20克水混合而成，这种酒精溶液中含酒精多少．
<gadget id="calculator">80 + 20</gadget>
<output>100</output>

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

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>