YOU SAID:

i sleept like three hours last night

INTO JAPANESE

昨夜は3時間くらい寝た

BACK INTO ENGLISH

I slept for 3 hours last night

INTO JAPANESE

昨夜は3時間寝た

BACK INTO ENGLISH

i slept 3 hours last night

INTO JAPANESE

私は昨夜3時間寝た

BACK INTO ENGLISH

i slept 3 hours last night