A wire is 16.4 meters long. (1/4) is used for the first time, and (1/2) meter is used for the second time. How many meters is left on the wire?
一根电线长16.4米，第一次用去(1/4)，第二次用去(1/2)米，这根电线还剩多少米？
<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">16.4 * (3/4)</gadget>
<output>12.3</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">12.3 - (1/2)</gadget>
<output>11.8</output>

<result>11.8</result>