On a drawing with a scale of 1:1000, the length of the lawn is measured to be 3 cm. How many meters is this lawn actually?
在一张比例尺为1：1000的图纸上，量得草坪的长3厘米．这块草坪实际长多少米．
<gadget id="calculator">1 / 1_000</gadget>
<output>1/1_000 = around 0.001</output>

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

<gadget id="calculator">3_000 / 100</gadget>
<output>30</output>

<result>30</result>