Last year, when Xutang Township built canals, 64.7 kilometers were built in January, 72.52 kilometers in February, and 30.73 meters less in March than the sum of the previous two months. How many meters were repaired in March?
去年徐塘乡修水渠，一月份修了64.7千米，二月份修了72.52千米，三月份修的比前两月的总和少30.73米，三月份修了多少米？
<gadget id="calculator">75.52 - 30.73</gadget>
<output>44.79</output>

<gadget id="calculator">64.7 + 44.79</gadget>
<output>109.49</output>

<result>109.49</result>