There are 14 discs in a box, and the colors of the discs are red, blue or green. The number of green discs is twice that of red discs and half that of blue discs. How many discs are green.
一个盒子中有14个光盘，光盘的颜色有红色的、蓝色的或绿色的．绿色光盘的个数是红色光盘的两倍，是蓝色光盘的一半．有多少个光盘是绿色的．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2) + 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">14 / (7/2)</gadget>
<output>4</output>

<result>4</result>