On a map with a scale of 1:1000, the length of a rectangular lawn is 9cm and the width is 7cm. What is the area of this rectangular lawn in square meters?
在一张比例尺是1：1000的地图上，量得一个长方形草坪的长是9cm，宽是7cm，这个长方形草坪的面积是多少平方米．
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">9 / (1/1_000) / 100</gadget>
<output>90</output>

<gadget id="calculator">7 / (1/1_000) / 100</gadget>
<output>70</output>

<gadget id="calculator">90 * 70</gadget>
<output>6_300</output>

<result>6_300</result>