A 12-meter-long iron wire is cut off (1/4) and then connected to another 2 meters. What is the length of the iron wire at this time?
12米长的铁丝，截去(1/4)后，再接上2米，这时铁丝长多少米．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">12 * (3/4)</gadget>
<output>9</output>

<gadget id="calculator">9 + 4</gadget>
<output>13</output>

<result>13</result>