He then went to see the oranges being harvested. He found out that they harvest 19 sacks per day. How many oranges do they harvest per day if each sack contains 4 oranges?
1. He went to see the oranges being harvested. 
2. He found out that they harvest 19 sacks per day. 
3. How many oranges do they harvest per day if each sack contains 4 oranges?

We are trying to find out how many oranges are being harvested per day. We are given that each sack contains 4 oranges, and that there are 19 sacks being harvested per day. 

To find out the total number of oranges being harvested per day, we need to multiply the number of sacks by the number of oranges in each sack. 

19 sacks x 4 oranges per sack = 76 oranges per day