The scale of a picture is 1:2,000,000. The distance between A and B is 140 kilometers. How many centimeters should be drawn on this picture?
一幅图的比例尺是1：2000000，A、B两地相距140千米，画在这幅图上应是多少厘米．
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">140 * 100_000 * (1/2_000_000)</gadget>
<output>7</output>

<result>7</result>