If (1/2) meter of 2-meter-long iron wire is used up, how many meters are left? What is the correct column
2米长的铁丝用去(1/2)米，还剩下多少米？正确列式是多少
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 - (1/2)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>