I must have somebody else's pants on

The teacher is asking an arithmetic question: "Jack, if you found three dollars in your right pocket and two dollars in your left pocket, what would you have?"

"I must have somebody else's pants on."

老师正在问一道算术题：“杰克，如果你在你右边口袋里发现了3美元，左边口袋里发现了4美元，你一共有多少呢？”

“我肯定是穿着别人的裤子。”