Xiaogang's father made a set of electric toys. When the alarm clock points to 7:00 am and 1:00 noon respectively, the electronic dog will blow the horn. Once the minute hand and the hour hand on the dial form a straight line in the opposite direction, the electronic dog will bark. Xiaogang's father wants to use this object to remind Xiaogang to eat breakfast and take a nap. Ask Xiaogang how many minutes he spent eating breakfast.
小刚的爸爸自制了一套电动玩具．当闹钟分别正点指向上午7点和中午1点时，电子狗便吹号．一旦表盘上分针与时针走成反向一条直线，电子狗便"汪汪"叫唤．小刚爸爸欲用此物提醒小刚吃早餐和睡午觉．问小刚在吃早餐过程中，花去多少分钟．
<gadget id="calculator">180 - 150</gadget>
<output>30</output>

<gadget id="calculator">6 - 0.5</gadget>
<output>5.5</output>

<gadget id="calculator">30 / 5.5</gadget>
<output>5.454545</output>

<result>5.454545</result>