669137 divided by 80 
Our goal is to divide 669137 by 80.

On to step 1:
When dividing 6 by 80, we get 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 80

Step 2:
66 divided by 80 is 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 80

Step 3:
80 can be fit into 669 8 times, resulting in a remainder of 29.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 640 from 669 and we're left with 29.
Grab the next digit (1) from the dividend, add it to 29, then carry on: 291 / 80

Advancing to step 4:
The number 80 fits into 291 3 times, leaving a remainder of 51.
The number 3 becomes the next digit in our result. 
Result so far: 83.0
Subtract 240 from 291 to get 51.
Grab the next digit (3) from the dividend, add it to 51, then carry on: 513 / 80

On to step 5:
513 divided by 80 is 6 with a remainder of 33.
The number 6 becomes the next digit in our result. 
Result so far: 836.0
The remainder is 33 after subtracting 480 from 513.
Bring next digit (7) of the dividend behind the 33 and repeat the process: 337 / 80

Step 6:
80 can be fit into 337 4 times, resulting in a remainder of 17.
Put 4 as the next digit of the answer. 
Result so far: 8364.0
Subtracting 320 from 337 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
170 divided by 80 is 2 with a remainder of 10.
The number 2 becomes the next digit in our result. 
Result so far: 8364.2
Subtract 160 from 170 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
If we divide 100 by 80, we get 1 and a remainder of 20.
Write down 1 as next digit of the result. 
Result so far: 8364.21
If we take 80 away from 100, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
When dividing 200 by 80, we get 2 with a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 8364.212
If we subtract 160 from 200, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 10:
80 goes into 400 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 8364.2125
If we take 400 away from 400, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
0 divided by 80 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8364.2125
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 8364.2125
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 8364.2125, with a leftover of 0.0.