The economic and technological development zone is 2000 meters long from east to west and 1500 meters long from north to south. How many square kilometers does this development zone cover?
经济技术开发区东西长2000米，南北长1500米．这个开发区占地多少平方千米？
<gadget id="calculator">1_500 / 1_000_000</gadget>
<output>3/2_000 = around 0.0015</output>

<gadget id="calculator">2_000 * (3/2_000)</gadget>
<output>3</output>

<result>3</result>