Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
Hugo can fold a small box in 3 seconds and a medium one in twice that time. Tom can fold both the small and medium boxes in 4 seconds. If Hugo and Tom want to leave as early as possible, how long (in seconds) will it take them to fold 2400 small boxes and 1800 medium boxes?

### Response:
If it takes Hugo twice the amount of time to fold a medium box than a small box, then he needs 3*2 = <<3*2=6>>6 seconds for the medium box
Tom can fold either the small or medium box in 4 seconds, so he's faster at folding the medium box than Hugo because 4s < 6s
If Hugo can fold the small box in 3 seconds, he's faster at folding the small boxes than Tom because 3s < 4s
Therefore Hugo should fold all small boxes and Tom should fold all the medium ones before doing the other size where they are slower
This means Hugo will fold 2400 small boxes in 2400*3 = <<2400*3=7200>>7200 seconds
Tom will fold 1800 medium boxes in 1800*4 = <<1800*4=7200>>7200 seconds
It will take 7200 seconds to fold all the boxes
#### 7200