In a bar chart, 80 people are represented by 2 cm long bars, so how many cm bars should be used to represent 120 people.
在一幅条形统计图中，用2厘米长的条形表示80人，那么120人要用多少厘米的条形表示．
<gadget id="calculator">120 / 40</gadget>
<output>3</output>

<result>3</result>