Pirate Rick sailed his ship to a tropical island in search of a site to bury his treasure.  After finding the perfect site, it took him 4 hours to dig up 8 feet of sand under which to bury the treasure.  Once the treasure was buried, he left the island.  Then, a tropical storm came and washed away half of the sand from on top of the treasure.  Next, a giant tsunami wave poured over the island, adding 2 feet of new sand back onto the site of his treasure. When Pirate Rick returned, how long did it take for him to dig up his treasure?
Pirate Rick digs at a rate of 8 feet of sand per 4 hours, or 8/4=<<8/4=2>>2 feet per hour.
Of the 8 feet of sand that were initially on top of the treasure, the storm washed 8/2=<<8/2=4>>4 feet of sand away.
Thus, after the storm and the tsunami, the treasure was buried beneath 8-4+2=<<8-4+2=6>>6 feet of sand.
Digging at a rate of 2 feet per hour, Pirate Rick could uncover his treasure in 6/2=3 hours.
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Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

At a laundromat, it costs $4 for a washer and a quarter for every 10 minutes in the dryer. Samantha does 2 loads of laundry in the wash and then divides all the washed clothes equally into 3 separate dryers. If she lets the dryers run for 40 minutes each, how much does she spend altogether?Samantha spends $4 x 2 = $<<4*2=8>>8 on washing.
Each dryer costs 25 x 4 = 100 cents = $1
Three dryers cost 1 x 3 = $<<3=3>>3
Altogether, she spends 8 + 3 = $<<8+3=11>>11
#### 11[END]

A man divides 3 hectares of land evenly among his 8 sons. If every 750m^2 of this land can be used to make a profit of $500 from every 3 months of commercial farming, how much can each son make if they cultivate their share of the land for one year(1 hectare is equal to 10000 m^2)?There are 10000m^2 in each hectare, so 3 hectares contains 3*10000 = 30000m^2 of land
30000m^2 is divided among 8 sons so each son will get 30000/8 = <<30000/8=3750>>3750m^2
In every 3750m^2, there are 3750/750 = <<3750/750=5>>5 portions of 750m^2 areas of land
Each son can make 5*$500 = $<<5*500=2500>>2500 every 3 months from cultivating their share
In one year there are 12 months so each son can make $2500 up to 12/3 = <<12/3=4>>4 times in a year
Each son can make a total of $2500*4 = $<<2500*4=10000>>10000 in a year
#### 10000[END]

Now, solve this next question in the style of the above examples:

Pirate Rick sailed his ship to a tropical island in search of a site to bury his treasure.  After finding the perfect site, it took him 4 hours to dig up 8 feet of sand under which to bury the treasure.  Once the treasure was buried, he left the island.  Then, a tropical storm came and washed away half of the sand from on top of the treasure.  Next, a giant tsunami wave poured over the island, adding 2 feet of new sand back onto the site of his treasure. When Pirate Rick returned, how long did it take for him to dig up his treasure?

### Response:
Pirate Rick digs at a rate of 8 feet of sand per 4 hours, or 8/4=<<8/4=2>>2 feet per hour.
Of the 8 feet of sand that were initially on top of the treasure, the storm washed 8/2=<<8/2=4>>4 feet of sand away.
Thus, after the storm and the tsunami, the treasure was buried beneath 8-4+2=<<8-4+2=6>>6 feet of sand.
Digging at a rate of 2 feet per hour, Pirate Rick could uncover his treasure in 6/2=3 hours.
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