On a 16:1 design drawing, a part is measured to be 4 cm long. What is the actual length of this part in cm?
在一幅16：1的设计图纸上，量得一个零件长4厘米，这个零件的实际长度是多少厘米．
<gadget id="calculator">16 / 1</gadget>
<output>16</output>

<gadget id="calculator">4 / 16</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>