He then went to see the oranges being harvested. He found out that they harvest 66 sacks per day. How many oranges do they harvest per day if each sack contains 28 oranges?
: 

1. He went to see the oranges being harvested. 
2. He found out that they harvest 66 sacks per day.

So we know that they harvest 66 sacks per day. 

3. If each sack contains 28 oranges, then we can multiply 66 by 28 to find out how many oranges they harvest per day. 

66 x 28 = 1,848 oranges per day