A tractor plows a piece of land, 65% of the total area has been plowed, and there are still 28 hectares left to be plowed. How many hectares are there in total?
一台拖拉机耕一片地，耕了总面积的65%，还剩下28公顷没耕完，这片地一共有多少公顷？
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">1 - (13/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">28 / (7/20)</gadget>
<output>80</output>

<result>80</result>