Betty has a tray of cookies and a tray of brownies.  She has a real sweet tooth and eats 3 cookies a day and 1 brownie a day.  If she starts with 60 cookies and 10 brownies, how many more cookies than brownies does she have after a week of eating like this?
First we find how many cookies Betty will eat in a week by multiplying her daily amount by 7, meaning 7*3=<<21=21>>21 cookies eaten in a week.
We repeat this for the brownies, finding she eats 7*1=<<7*1=7>>7 brownies in a week.
We subtract the 21 cookies from the original amount of 60, finding 60-21= <<60-21=39>>39 cookies remaining.
We repeat this step for the brownies, finding 10-7= <<10-7=3>>3 brownies remaining.
In the end, therefore, Betty has 39-3= <<39-3=36>>36 more cookies than brownies.
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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:

John is 15 cm taller than Lena and 6 cm shorter than Rebeca. If John has a height of 152 cm, what is the height of Lena and Rebeca together?Lena is 152 cm - 15 cm = <<152-15=137>>137 cm tall
Rebeca is 152 cm + 6 cm = <<152+6=158>>158 cm tall
So, the total height of Lena and Rebeca would be 137 cm + 158 cm = <<137+158=295>>295 cm.
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The mayor commissioned two artists to paint 50 murals around the city. Once the work was completed, Celina was paid $1,000 more than 4 times the amount Diego got. If the mayor paid the two a total of $50,000, how much did Diego get?Let d be Diego’s payment
Both artists were paid (1000 + 4 * d ) + d = 50000 dollars
This means that 5d = (50000 - 1000) dollars
Therefore Diego was paid d = 49000 / 5 = <<49000/5=9800>>9800 dollars
#### 9800[END]

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

Betty has a tray of cookies and a tray of brownies.  She has a real sweet tooth and eats 3 cookies a day and 1 brownie a day.  If she starts with 60 cookies and 10 brownies, how many more cookies than brownies does she have after a week of eating like this?

### Response:
First we find how many cookies Betty will eat in a week by multiplying her daily amount by 7, meaning 7*3=<<21=21>>21 cookies eaten in a week.
We repeat this for the brownies, finding she eats 7*1=<<7*1=7>>7 brownies in a week.
We subtract the 21 cookies from the original amount of 60, finding 60-21= <<60-21=39>>39 cookies remaining.
We repeat this step for the brownies, finding 10-7= <<10-7=3>>3 brownies remaining.
In the end, therefore, Betty has 39-3= <<39-3=36>>36 more cookies than brownies.
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