Hedgehogs hibernate for about 200 days, snakes hibernate for about 9/10 of hedgehogs, and bears hibernate for about 2/3 of snakes. How many days do bears hibernate?
刺猬冬眠的时间约是200天，蛇冬眠的时间约是刺猬的(9/10)，熊冬眠的时间约是蛇的(2/3)，熊冬眠的时间约是多少天？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">200 * (9/10) * (2/3)</gadget>
<output>120</output>

<result>120</result>