A farm raises 400 chickens, 200 ducks, and 120 geese. When making a bar chart, if the height of the goose bar is 6 cm, then how many centimeters is the height of the chicken bar?
一个饲养场养鸡400只，鸭200只，鹅120只．在制作条形统计图时，表示鹅的直条高6厘米，那么表示鸡的直条高多少厘米．
<gadget id="calculator">120 / 6</gadget>
<output>20</output>

<gadget id="calculator">400 / 20</gadget>
<output>20</output>

<result>20</result>