If (1/2) of an 8-meter-long wire is used up, and then (1/2) meter is used up, how many meters are shared between the two times?
如果8米长的电线用去(1/2)后，再用去(1/2)米，则两次共用去多少米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 * (1/2)</gadget>
<output>4</output>

<gadget id="calculator">4 + (1/2)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>