12972 divided by 99 
We're looking to find how many times 99 goes into 12972.

Moving on to step 1:
If we divide 1 by 99, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 99

Moving on to step 2:
99 can be fit into 12 0 times, resulting in a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 99

Let's proceed to step 3:
129 divided by 99 is 1 with a remainder of 30.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 99 from 129, we get 30.
Take the next digit (7) from the dividend and append it to 30, then repeat: 307 / 99

Let's proceed to step 4:
The number 99 fits into 307 3 times, leaving a remainder of 10.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtracting 297 from 307 leaves us with 10.
Grab the next digit (2) from the dividend, add it to 10, then carry on: 102 / 99

Step 5:
When dividing 102 by 99, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 131.0
If we take 99 away from 102, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 6:
The number 99 fits into 30 0 times, leaving a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 131.0
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 7:
If we divide 300 by 99, we get 3 and a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 131.03
Deduct 297 from 300 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 8:
99 goes into 30 0 times with a remainder of 30.
The next digit of our result is 0. 
Result so far: 131.03
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 9:
If we divide 300 by 99, we get 3 and a remainder of 3.
The next digit of our result is 3. 
Result so far: 131.0303
If we subtract 297 from 300, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 10:
99 goes into 30 0 times with a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 131.0303
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 11:
When dividing 300 by 99, we get 3 with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 131.030303
The remainder is 3 after subtracting 297 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 12:
99 can be fit into 30 0 times, resulting in a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 131.030303
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 13:
99 can be fit into 300 3 times, resulting in a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 131.03030303
If we subtract 297 from 300, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 131.03030303 with a remainder of 3e-09.