The hibernation time of snakes is 80 days, the hibernation time of frogs is about (5/6) of snakes, and the hibernation time of bears is (4/5) of frogs. How long does a frog hibernate for?
蛇的冬眠时间是80天，青蛙冬眠时间大约是蛇的(5/6)，熊的冬眠时间是青蛙的(4/5)．青蛙的冬眠时间大约是多少天？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">80 * (5/6)</gadget>
<output>200/3 = around 66.666667</output>

<result>200/3 = around 66.666667</result>