A tractor plows 3.92 hectares in the morning, which is 0.98 hectares more than in the afternoon. How many hectares are cultivated in total on this day?
一台拖拉机上午耕地3.92公顷，比下午多耕地0.98公顷，这天一共耕地多少公顷？
<gadget id="calculator">3.92 - 0.98</gadget>
<output>2.94</output>

<gadget id="calculator">2.94 + 3.92</gadget>
<output>6.86</output>

<result>6.86</result>