Uncle Wang has a corn field of (7/8) hectares. He plowed some of it on the first day, and there is still (2/3) left to be plowed. How much of this land has been plowed.
王大爷有一块(7/8)公顷的玉米地，第一天耕了一些，还剩(2/3)没有耕完，已经耕了这块地的多少．
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>