The construction team repaired a canal, on average, 12% of the total length was repaired every day and 0.6 meters more, and it was exactly half of the total length in 4 days. How many meters is this canal?
工程队修一条水渠，平均每天修全长的12%还多0.6米，4天正好修了全长的一半．这条水渠长多少米？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / 4</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">(1/8) - (3/25)</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">0.6 / (1/200)</gadget>
<output>120</output>

<result>120</result>