Wu Gorge is 40 kilometers long, which is 2 kilometers longer than (1/2) the length of Xiling Gorge. How many kilometers long is Xiling Gorge? (Solution of column equation)
巫峡长40千米，比西陵峡长度的(1/2)多2千米，西陵峡长多少千米？(列方程解)
<gadget id="calculator">40 - 2</gadget>
<output>38</output>

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

<gadget id="calculator">38 / (1/2)</gadget>
<output>76</output>

<result>76</result>