The scale of a precision parts drawing is 5:1. The length of a part measured on the drawing is 25 mm, what is the actual length of the part.
一张精密零件图纸的比例尺是5：1．在图纸上量得某个零件的长度是25毫米，这个零件的实际长度是多少．
<gadget id="calculator">5 / 1</gadget>
<output>5</output>

<gadget id="calculator">25 / 5</gadget>
<output>5</output>

<result>5</result>