The hibernation time of snake is 180 days, the hibernation time of frog is about (5/6) of snake, and the hibernation time of bear is (4/5) of frog. How many days do bears hibernate?
蛇的冬眠时间是180天，青蛙的冬眠时间约是蛇的(5/6)，熊的冬眠时间是青蛙的(4/5)．熊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">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">180 * (5/6) * (4/5)</gadget>
<output>120</output>

<result>120</result>