On the drawing with a scale of 4:1, the length of a part is measured as 1.6cm, what is the actual length of this part in cm
在比例尺是4：1的图纸上，量得一个零件的长是1.6cm，这个零件实际的长是多少cm
<gadget id="calculator">4 / 1</gadget>
<output>4</output>

<gadget id="calculator">1.6 / 4</gadget>
<output>0.4</output>

<result>0.4</result>