If you cultivate a piece of land, on the first day you cultivate 0.5 hectares less than half of the whole land, on the second day you cultivate 0.2 hectares more than half of the remaining half, and on the third day after you plow 2 hectares, there is still 0.5 hectares left. This land has How many hectares?
耕一块地，第一天耕的比整块地的一半少0.5公顷，第二天耕的比余下的一半多0.2公顷，第三天耕了2公顷后还剩下0.5公顷，这块地有多少公顷？
<gadget id="calculator">2 + 0.5 + 0.2</gadget>
<output>2.7</output>

<gadget id="calculator">2.7 * 2</gadget>
<output>5.4</output>

<gadget id="calculator">5.4 - 0.5</gadget>
<output>4.9</output>

<gadget id="calculator">4.9 * 2</gadget>
<output>9.8</output>

<result>9.8</result>