The scale of a drawing of a precision instrument part is 50:1, the length on the drawing is 5 cm, how many centimeters is the actual length.
一个精密仪器零件图纸的比例尺是50：1，图上长5厘米，实际长多少厘米．
<gadget id="calculator">50 / 1</gadget>
<output>50</output>

<gadget id="calculator">5 / 50</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>