On a plane plan with a scale of 1:50, the length of an object is measured to be 5 cm. What is the actual length of this object?
在一幅比例尺为1：50的平面图上，量得一个物体的长度为5厘米．这个物体的实际长度是多少？
<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">5 / (1/50)</gadget>
<output>250</output>

<result>250</result>