A canal has been built for 5.6 kilometers, and the unrepaired one is 2.7 times that of the one that has been built. How many kilometers is the total length of this canal?
一条水渠，已经修了5.6千米，未修的是已修的2.7倍，这条水渠全长多少千米？
<gadget id="calculator">2.7 + 1</gadget>
<output>3.7</output>

<gadget id="calculator">5.6 * 3.7</gadget>
<output>20.72</output>

<result>20.72</result>