A rectangular playground is drawn on a plan with a length of 5 cm and a width of 3 cm according to the scale of 1:3000. What is the actual area of the playground in square meters?
一个长方形操场，按1：3000的比例尺画在平面图上长5厘米，宽3厘米，这个操场的实际面积是多少平方米．
<gadget id="calculator">1 / 3_000</gadget>
<output>1/3_000 = around 0.000333</output>

<gadget id="calculator">5 / (1/3_000) / 100</gadget>
<output>150</output>

<gadget id="calculator">3 / (1/3_000) / 100</gadget>
<output>90</output>

<gadget id="calculator">150 * 90</gadget>
<output>13_500</output>

<result>13_500</result>