Xiaohong's father's unit adopts the "9-to-5" work system, which means that he goes to work at 9 am and leaves at 5 pm. How many hours does Xiaohong's father have to pass from work to get off work every day?
小红爸爸的单位采用"朝九晚五"工作制，意思是上午9时上班，下午5时下班．小红爸爸每天从上班到下班一共要经过多少小时．
<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<result>8</result>