A steel pipe is 8 meters long, part of it is used up, and 1/4 of the full length is left. How many meters are left?
一根钢管长8米，用去一部分，还剩下全长的(1/4)，还剩下多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">8 * (3/4)</gadget>
<output>6</output>

<result>6</result>