The scale of a drawing is 6:1. If the length of a line segment measured on the drawing is 48 mm, what is the actual length?
一张图纸的比例尺是6：1，如果在图上量线段的长是48毫米，实际长多少．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">4.8 / (1/6)</gadget>
<output>28.8</output>

<result>28.8</result>