YOU SAID:
Mike's grandma's grandson is Mike.
INTO JAPANESE
マイクのおばあちゃんの孫はマイクです。
BACK INTO ENGLISH
Mike's grandmother's grandson is Mike.
INTO JAPANESE
マイクの祖母の孫はマイクです。
BACK INTO ENGLISH
Mike's grandmother's grandson is Mike.
You love that! Don't you?