A piece of iron wire, use up (3/4) of it, and there are 8 meters left, how long is this iron wire in meters
一根铁丝，用去它的(3/4)，还剩8米，这根铁丝长多少米
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">8 / (1/4)</gadget>
<output>32</output>

<result>32</result>