A park has 50 benches with a capacity of 4 people each. On a Sunday afternoon, 80 people were sitting on the benches. What's the number of available spaces on the benches that other people can sit on before the carrying capacity of the benches is full?
In the park, 50 benches with a capacity of four people each have a total capacity of 50*4 = <<50*4=200>>200 sitting spaces.
If 80 people are already using spaces, the number of empty spaces is 200-80 =120
#### 120
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:

Brenda is a vet who needs to spay some cats and twice as many dogs. If she needs to spay 21 animals total today, how many cats does she need to spay?Let c be the number of cats Brenda needs to spay and d be the number of dogs. We know that c + d = 21 and d = 2c.
Substituting the second equation into the first, we get c + 2c = 21
Combining like terms, we get 3c = 21
Dividing both sides by 3, we get c = 7
#### 7[END]

We harvested 405 kg of apples. 90 kg were used to make fruit juice and 60 kg were given to a restaurant. The rest was sold in 5 kg bags and their sale brought in $408. What was the selling price of one bag of apples?The weight of apples used for juice and given to the restaurant is 60 + 90 = <<60+90=150>>150 kg
Thus 405 – 150 = 255kg worth of apples were sold in 5 kg bags.
There were 255 / 5 = <<255/5=51>>51 bags sold.
So each bag was sold for 408 / 51 = $<<408/51=8>>8
#### 8[END]

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

A park has 50 benches with a capacity of 4 people each. On a Sunday afternoon, 80 people were sitting on the benches. What's the number of available spaces on the benches that other people can sit on before the carrying capacity of the benches is full?

### Response:
In the park, 50 benches with a capacity of four people each have a total capacity of 50*4 = <<50*4=200>>200 sitting spaces.
If 80 people are already using spaces, the number of empty spaces is 200-80 =120
#### 120