The engineering team dug a 10.5-kilometer-long canal in three months. In the first month, they dug 2.65 kilometers. In the second month, they dug 0.74 kilometers more than in the first month. How many kilometers did they dig in the third month? ?
工程队用三个月挖一条10.5千米长的水渠，第一个月挖了2.65千米，第二个月比第一个月多挖了0.74千米，第三个月挖了多少千米？
<gadget id="calculator">2.65 + 0.74</gadget>
<output>3.39</output>

<gadget id="calculator">10.5 - 2.65 - 3.39</gadget>
<output>4.46</output>

<result>4.46</result>