140 cm long iron wire is used to form a rectangle whose length is 4 times its width. What is the width of this rectangle in cm?
用长140厘米的铁丝围成一个长方形，长是宽的4倍，这个长方形的宽是多少厘米？
<gadget id="calculator">140 / 2</gadget>
<output>70</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">70 * (1/5)</gadget>
<output>14</output>

<result>14</result>