A rectangular playground is drawn on a drawing at a scale of 1:4000. The length is 3 cm and the width is 2 cm. What is the actual area of the playground?
一个长方形的操场，按1：4000的比例尺画在图纸上，长是3厘米、宽是2厘米，求这个操场的实际面积？
<gadget id="calculator">1 / 4_000</gadget>
<output>1/4_000 = around 0.00025</output>

<gadget id="calculator">3 / (1/4_000) / 100</gadget>
<output>120</output>

<gadget id="calculator">2 / (1/4_000) / 100</gadget>
<output>80</output>

<gadget id="calculator">120 * 80</gadget>
<output>9_600</output>

<result>9_600</result>