On the (1/1000) plan, the length of a rectangular playground is 24 cm and the width is 18 cm. What is the actual perimeter of this rectangular playground in kilometers?
在(1/1000)的平面图上，量得一块长方形操场的长是24厘米，宽是18厘米，这块长方形操场的实际周长是多少千米？
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">24 / (1/1_000) / 100_000</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">18 / (1/1_000) / 100_000</gadget>
<output>9/50 = around 0.18</output>

<gadget id="calculator">(6/25) + (9/50)</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">(21/50) * 2</gadget>
<output>21/25 = around 0.84</output>

<result>21/25 = around 0.84</result>