An engineering team built a canal in three days. Half of the total length was built on the first day, the remaining half was more than 10 meters on the second day, and 60 meters on the third day. How many meters is this canal? (Hint: Let the total length of this canal be x meters)
某工程队三天修完一条水渠，第一天修了全长的一半，第二天修了剩下的一半多10米，第三天修了60米，这条水渠多少米？(提示：设这条水渠全长x米)
<gadget id="calculator">10 + 60</gadget>
<output>70</output>

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

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">70 / (1/4)</gadget>
<output>280</output>

<result>280</result>