YOU SAID:

My cat ate a lemon and then three up on the couch

INTO JAPANESE

私の猫はレモンを1個食べて、ソファで3つ寝ました

BACK INTO ENGLISH

My cat ate one lemon and slept three on the sofa

INTO JAPANESE

私の猫はレモンを 1 つ食べて、ソファで 3 つ寝ました

BACK INTO ENGLISH

My cat ate one lemon and slept three on the sofa