The 8-meter (3/4) is more or less the same length as the 30-meter one.
8米的(3/4)和30米的多少一样长．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / 30</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">8 * (1/40)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>