A piece of land has (7/8) hectares, and it can be plowed by 2 tractors in (3/4) hours. On average, how many hectares of land is plowed per tractor per hour?
一块地有(7/8)公顷，用2台拖拉机耕，(3/4)小时可以耕完．平均每台拖拉机每小时耕地多少公顷？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(7/8) / 2 / (3/4)</gadget>
<output>7/12 = around 0.583333</output>

<result>7/12 = around 0.583333</result>