Divide a 2-meter-long rope into 7 parts, how many meters are the 3 parts?
把2米长的绳子平均分成7份，其中3份是多少米
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) * 2 * 3</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>