YOU SAID:

my phone is dumber than a box of rocks

INTO JAPANESE

私の携帯は岩の箱よりも暗い

BACK INTO ENGLISH

My phone is darker than a rock box

INTO JAPANESE

私の携帯電話はロックボックスよりも暗いです

BACK INTO ENGLISH

My phone is darker than the lockbox

INTO JAPANESE

携帯電話がロックボックスよりも暗い

BACK INTO ENGLISH

The phone is darker than the lockbox

INTO JAPANESE

電話はロックボックスより暗い

BACK INTO ENGLISH

Phone is darker than lockbox

INTO JAPANESE

電話はロックボックスより暗い

BACK INTO ENGLISH

Phone is darker than lockbox