A tractor plows 3.96 hectares in the afternoon, 0.98 hectares more in the afternoon than in the morning. How many hectares of arable land are there in total?
一台拖拉机下午耕地3.96公顷，下午比上午多耕地0.98公顷．这天一共耕地多少公顷？
<gadget id="calculator">3.96 - 0.98</gadget>
<output>2.98</output>

<gadget id="calculator">2.98 + 3.96</gadget>
<output>6.94</output>

<result>6.94</result>