There are 6 bottles of mineral water, Xiong Da and Xiong Er drank all the mineral water together, among which Xiong Er drank twice as much mineral water as Xiong Da, so how many bottles of mineral water did Xiong Da drink?
有6瓶矿泉水，熊大和熊二一起把矿泉水都喝光了，其中熊二喝的矿泉水比熊大喝的矿泉水多一倍，那么熊大喝了多少瓶矿泉水．
<gadget id="calculator">1 * 1</gadget>
<output>1</output>

<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<result>2</result>