A colored ribbon, after cutting off 60cm, there is still (2/5), how many centimeters is this colored ribbon originally?
一根彩带，剪去60cm后，还剩(2/5)，这根彩带原来有多少厘米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<result>100</result>