A piece of land is plowed by a tractor, and (11/6) hectares are plowed in 45 minutes, which is equivalent to (11/21) of the total area of the land. How many hectares does this land have?
一块地用拖拉机来耕，45分钟耕了(11/6)公顷，相当于这块地总面积的(11/21)，这块地有多少公顷？
<gadget id="calculator">11 / 6</gadget>
<output>11/6 = around 1.833333</output>

<gadget id="calculator">11 / 21</gadget>
<output>11/21 = around 0.52381</output>

<gadget id="calculator">(11/6) / (11/21)</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>