The school playground is 200 meters long and 100 meters wide. If it is drawn on a plan with a scale of 1:1000, what is the length in centimeters?
学校操场长200米，宽100米，画在比例尺是1：1000的平面图上，长应画多少厘米．
<gadget id="calculator">200 * 100</gadget>
<output>20_000</output>

<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">20_000 * (1/1_000)</gadget>
<output>20</output>

<result>20</result>