Xiaoqiao cut off a 20 cm long section from a ribbon, and the rest is equivalent to 6 sections like this. How many centimeters was the ribbon originally?
小巧在一条丝带上剪下20厘米长的一段，剩下的相当于这样的6段长．这条丝带原来长几厘米？
<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">20 * 7</gadget>
<output>140</output>

<result>140</result>