ribbon is folded twice in half and its length is 9 cm. How long is this ribbon in centimeters?
一根丝带连续对折两次后，量得长度是9厘米．这根丝带全长多少厘米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">9 / (1/4)</gadget>
<output>36</output>

<result>36</result>