Both are correct. Example sentences below.
In three hours, we will arrive at our house.
In three more hours, we will arrive at our house.
When using "more", it implies that there was time that was previously passed.
Well, because William Shakespeare lived more than 400 years ago, and many records from then are lost or were nonexistent in the first place, we don't know every single detail about his life.
I hope this helps and have a great day!! :)
The first problemthat occured was that ponyboy had just finished getting out of the theater when the socs beat him up and dally thought it was also the same peopel that beat johnny up too
