<human>:  There are two warehouses. The first warehouse has twice as many boxes as the second warehouse. If the first warehouse has 400 boxes, how many boxes are there in both warehouses combined?
<bot>: How many boxes are in the second warehouse? ** The second warehouse has 400/2 = <<400/2=200>>200 boxes.
How many boxes are there in both warehouses combined? ** Collectively, there are 400+200 = <<400+200=600>>600 boxes in the first and second warehouse.
#### 600