Dad started making machine parts at 7:30 am and continued until 12:30 am. If he made 8 parts per hour, how many parts did he make in total in the morning?
爸爸从上午7：30开始做机器零件，一直做到12：30，如果他每小时做8个零件，上午一共做了多少个零件？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<result>40</result>