Draw a part of a precision instrument on the drawing, the scale is 50:1, and the length on the drawing is 8 cm, what is its actual length in millimeters?
把一精密仪器的零件画在图纸上，比例尺是50：1，量得图上的长度是8厘米，则它的实际长度是多少毫米．
<gadget id="calculator">8 / 50</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">(4/25) * 10</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>