How do I work 8hrs when I get the job down quick?

Hi all. I’m new to remote work, I get paid hourly and am expected to work 8hrs per day. However all my other jobs I’ve completed tasks much faster than my coworkers. So my question is would it be okay to get the job done quicker but still put 8hrs? Am I even being tracked? Just to put things into perspective, if the average time for someone to do a specific task at a previous job was two working days, I would do it in one. I’m new for his so any advice would help!