YOU SAID:

My shirts are as stiff as a board it's like someone threw a bunch of salt in my washing machine

INTO JAPANESE

私のシャツはボードと同じくらい固くて、誰かが私の洗濯機に塩をたくさん投げたようなもの

BACK INTO ENGLISH

My shirt is as hard as the board, like someone throwing a lot of salt into my washing machine

INTO JAPANESE

私のシャツはボードと同じくらい硬い、誰かが私の洗濯機にたくさんの塩を投げているような

BACK INTO ENGLISH

My shirt is as hard as the board, like someone throwing a lot of salt into my washing machine