673601 ÷ 80 
Let's see how many times 80 fits into 673601.

Moving on to step 1:
80 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (7) from the dividend, add it to 6, then carry on: 67 / 80

Moving on to step 2:
When dividing 67 by 80, we get 0 with a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Include the next digit (3) from the dividend after 67, then repeat: 673 / 80

Advancing to step 3:
When dividing 673 by 80, we get 8 with a remainder of 33.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
Subtracting 640 from 673 leaves us with 33.
Bring next digit (6) of the dividend behind the 33 and repeat the process: 336 / 80

Step 4:
336 divided by 80 is 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 84.0
The remainder is 16 after subtracting 320 from 336.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 80

Step 5:
80 goes into 160 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 842.0
If we take 160 away from 160, we end up with 0.
Append the next digit (1) from the dividend to 0 and continue with: 1 / 80

Let's proceed to step 6:
80 goes into 1 0 times with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 8420.0
If we take 0 away from 1, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
80 goes into 10 0 times with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 8420.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
When dividing 100 by 80, we get 1 with a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 8420.01
The remainder is 20 after subtracting 80 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 9:
The number 80 fits into 200 2 times, leaving a remainder of 40.
Use 2 as the next digit of our solution. 
Result so far: 8420.012
Subtracting 160 from 200 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
If we divide 400 by 80, we get 5 and a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 8420.0125
If we subtract 400 from 400, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 11:
If we divide 0 by 80, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 8420.0125
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
80 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 8420.0125
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.

Our division results in 8420.0125 with a remaining 0.0.