A bottle of beverage (3/10) liters, naughty drank (2/3), how many liters did he drink.
一瓶饮料(3/10)升，淘气喝了(2/3)，他喝了多少升．
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/10) * (2/3)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>