Divide a 3-meter-long steel pipe into 4 sections on average, each section is ((())/(())) of this steel pipe, and how many meters is each section long.
把3米长的钢管平均分成4段，每段是这根钢管的((())/(()))，每段长多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>