Let's write out what we know:
270 sheets of paper per minute
8 pages per sheet
And the question is asking about the number of pages in an hour. So, this makes our problem multiplication:
270 x 8 = 2160
But that's just the number of pages per minute, we need pages per hour. How many minutes are in an hour? 60. So we multiply that answer by 60:
2160 x 60 = 129600
The offset press can print 129,600 nwespaper pages per hour.