That's all there is to it, Bobby, my boy. All you have to remember is first find the common denominator, then subtract.
8 seconds sound clip from the The Day the Earth Stood Still (1954) classic radio play.
You can hear this line at 00:28:43 in the radio play.
Quote context
[...]
- I'm sorry. I guess I'm just tired of hearing about 'Mr. Carpenter, Mr. Carpenter.'
- I don't like the way he's attached himself to you and Bobby. After all, what do you know about him?
- Well, let's not stand and talk about it any more. I'll go up and get my things.
- Gee, Mr. Carpenter. Thanks a lot for helping me with my homework.
- I gotcha. Thanks, Mr. Carpenter.
- I'm leaving with Tom, Bobby. You'll go to bed on time now, won't you?
- I'll say good night again, Mrs. Benson.
- Yes?
[...]