YOU SAID:

what goes around comes in handy

INTO JAPANESE

何が起きるのかが役に立つ

BACK INTO ENGLISH

What happens is useful

INTO JAPANESE

何が起こるのが便利です

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What is convenient to happen

INTO JAPANESE

起こるのに便利なもの

BACK INTO ENGLISH

Things that are convenient to happen

INTO JAPANESE

起こるのに便利なこと

BACK INTO ENGLISH

Convenience things to happen

INTO JAPANESE

起こるべき便利なこと

BACK INTO ENGLISH

Convenient things to happen

INTO JAPANESE

起こるべき便利なこと

BACK INTO ENGLISH

Convenient things to happen