YOU SAID:

My hot sister is 7000000000 years old

INTO JAPANESE

私の熱い妹は7000000000歳です

BACK INTO ENGLISH

My hot sister is 7000000 million years old

INTO JAPANESE

私の熱い妹は7000000百万歳です

BACK INTO ENGLISH

My hot sister is 7,000,000 million years old

INTO JAPANESE

私の熱い妹は700万歳です

BACK INTO ENGLISH

My hot sister is 7 million years old

INTO JAPANESE

私の熱い妹は700万歳です

BACK INTO ENGLISH

My hot sister is 7 million years old