For a precision part, the measured part model is 40 mm long, and the actual length ratio of the model to the part is 5:1. What is the actual length of the part in mm?
一个精密零件，量得零件模型长40毫米，模型与零件的实际长度比是5：1这个零件的实际长度是多少毫米？
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">40 / 5</gadget>
<output>8</output>

<result>8</result>