YOU SAID:

i went to the store to buy cereal

INTO JAPANESE

私はシリアルを買うために店に行きました

BACK INTO ENGLISH

I went to the store to buy cereal

INTO JAPANESE

シリアルを買いに店に行きました

BACK INTO ENGLISH

I went to the store to buy cereal.

INTO JAPANESE

私はシリアルを買うために店に行きました。

BACK INTO ENGLISH

I went to the store to buy cereal.