A and B work together to process a batch of parts. A processes 58 parts per hour, and B processes 42 parts per hour. They share 5 hours to complete the task. How many parts are there in total?
甲、乙两人合作加工一批零件，甲每时加工58个，乙每时加工42个，共用5时完成任务．这批零件一共有多少个？
<gadget id="calculator">58 + 42</gadget>
<output>100</output>

<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<result>500</result>