The 1-meter (4/7) is the same length as the 4-meter ((())/(())).
1米的(4/7)和4米的((())/(()))一样长．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) / 4</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 * (1/7)</gadget>
<output>1/7 = around 0.142857</output>

<result>1/7 = around 0.142857</result>