Xiaohong went to bed at 8 o'clock in the evening and got up at 6 o'clock in the morning, how many hours did she sleep?
小红晚上8点睡觉，早上6点起床，她睡了多少小时．
<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<result>10</result>