📚IDIOM: kill two birds with one stone
If you kill two birds with one stone, you achieve two things with the one action.
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🔺I need to go to the bank, and if I drop the books off at the library on the way I’ll be killing two birds with one stone.
🔺Jenny says that she kills two birds with one stone if she does her own housework because she gets the house clean and she gets some exercise at the same time.