Saw a 2-meter-long rope into small sections of the same length, and saw 7 times in total. What is the total length of the 3 sections?
把2米长的绳子锯成同样长的小段，共锯7次，3段占全长的多少
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

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

<gadget id="calculator">3 * (1/8)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>