We look at the division of 671991 by 23 
We want to figure out the number of times 671991 can be divided by 23.

Step 1:
When dividing 6 by 23, we get 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (7) from the dividend to 6 and continue with: 67 / 23

Step 2:
The number 23 fits into 67 2 times, leaving a remainder of 21.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 46 away from 67, we end up with 21.
Fetch the next digit (1) from the dividend, attach it to 21 and continue: 211 / 23

Advancing to step 3:
23 goes into 211 9 times with a remainder of 4.
Put 9 as the next digit of the answer. 
Result so far: 29.0
If we subtract 207 from 211, we get 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 23

Moving on to step 4:
The number 23 fits into 49 2 times, leaving a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 292.0
Subtracting 46 from 49 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 23

Moving on to step 5:
23 can be fit into 39 1 times, resulting in a remainder of 16.
The next digit of our result is 1. 
Result so far: 2921.0
If we take 23 away from 39, we end up with 16.
Bring next digit (1) of the dividend behind the 16 and repeat the process: 161 / 23

Moving on to step 6:
If we divide 161 by 23, we get 7 and a remainder of 0.
The number 7 becomes the next digit in our result. 
Result so far: 29217.0
Subtract 161 from 161 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.

Step 7:
0 divided by 23 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 29217.0
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.

Moving on to step 8:
If we divide 0 by 23, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 29217.0
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.

After the division, we end up with 29217.0 and a remainder of 0.0.