The scale of the school playground is (1/2000). The length on the map is 3.5 cm and the width is 2 cm. What is the actual area of the playground in square meters?
学校操场的平面图，比例尺是(1/2000)，量得图上的长是3.5厘米，宽是2厘米，操场的实际面积是多少平方米？
<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">3.5 / (1/2_000) / 100</gadget>
<output>70</output>

<gadget id="calculator">2 / (1/2_000) / 100</gadget>
<output>40</output>

<gadget id="calculator">70 * 40</gadget>
<output>2_800</output>

<result>2_800</result>