Pour a carton of milk into 3 cups on average, Lan Lan drank 2 cups, how much did she drink from this carton of milk?
把一盒牛奶平均倒在3个杯子里，兰兰喝了2杯，她喝了这盒牛奶的多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 * (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>