If a piece of cloth is cut off by 2.8 meters, the remaining 3/5. If you want to leave 1/8, how many meters should be cut off?
一段布如果剪去2.8米，则余3/5．如果想余1/8，应剪去多少米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.8 / (2/5)</gadget>
<output>7</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">7 * (7/8)</gadget>
<output>49/8 = around 6.125</output>

<result>49/8 = around 6.125</result>