We look at the division of 172992 by 91 
We want to divide 172992 by 91.

Advancing to step 1:
The number 91 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (7) from the dividend, attach it to 1 and continue: 17 / 91

On to step 2:
91 can be fit into 17 0 times, resulting in a remainder of 17.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 17 and we're left with 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 91

Step 3:
The number 91 fits into 172 1 times, leaving a remainder of 81.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 91 from 172, we get 81.
Fetch the next digit (9) from the dividend, attach it to 81 and continue: 819 / 91

Let's proceed to step 4:
91 can be fit into 819 9 times, resulting in a remainder of 0.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Deduct 819 from 819 and we're left with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 91

Advancing to step 5:
If we divide 9 by 91, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 190.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 91

Advancing to step 6:
When dividing 92 by 91, we get 1 with a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1901.0
The remainder is 1 after subtracting 91 from 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
91 goes into 10 0 times with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1901.0
Subtract 0 from 10 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.

Let's proceed to step 8:
91 goes into 100 1 times with a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 1901.01
If we take 91 away from 100, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 9:
91 can be fit into 90 0 times, resulting in a remainder of 90.
Put 0 as the next digit of the answer. 
Result so far: 1901.01
Subtract 0 from 90 to get 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 10:
When dividing 900 by 91, we get 9 with a remainder of 81.
The number 9 becomes the next digit in our result. 
Result so far: 1901.0109
Subtract 819 from 900 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Step 11:
91 can be fit into 810 8 times, resulting in a remainder of 82.
Write down 8 as next digit of the result. 
Result so far: 1901.01098
Subtract 728 from 810 to get 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 12:
When dividing 820 by 91, we get 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 1901.010989
Subtract 819 from 820 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 13:
If we divide 10 by 91, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 1901.010989
If we subtract 0 from 10, we 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.

Advancing to step 14:
The number 91 fits into 100 1 times, leaving a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1901.01098901
Deduct 91 from 100 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

After the division, we end up with 1901.01098901 and a remainder of 9e-09.