In a bar graph, if 800,000 tons is represented by 2 centimeters, how many centimeters should be used to represent 2 million tons.
在一幅条形统计图里，如果用2厘米代表80万吨，那么应该用多少厘米表示200万吨．
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">200 / 40</gadget>
<output>5</output>

<result>5</result>