In the experiment of keeping the bamboo pole balanced, how many chess pieces should be placed on the scale 4 on the left side and how many chess pieces should be placed on the scale 2 on the right side to make the bamboo pole balanced.
在竹杆保持平衡的实验中，左边在刻度4上放3个棋子，右边在刻度2上应放多少个棋子才能使竹杆平衡．
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>