The drawing scale of a precision part is 8:1. Draw a 4cm line segment on the drawing to indicate the actual length in cm.
一个精密零件的图纸比例尺是8：1，图纸上画一条4cm的线段，表示实际长是多少cm．
<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>