12985632 ÷ 816 
Let's see how many times 816 fits into 12985632.

On to step 1:
816 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 816

Moving on to step 2:
The number 816 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Fetch the next digit (9) from the dividend, attach it to 12 and continue: 129 / 816

On to step 3:
When dividing 129 by 816, we get 0 with a remainder of 129.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 129 after subtracting 0 from 129.
Grab the next digit (8) from the dividend, add it to 129, then carry on: 1298 / 816

Going ahead to step 4:
1298 divided by 816 is 1 with a remainder of 482.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 816 from 1298, we get 482.
Fetch the next digit (5) from the dividend, attach it to 482 and continue: 4825 / 816

Going ahead to step 5:
When dividing 4825 by 816, we get 5 with a remainder of 745.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 4080 from 4825 and we're left with 745.
Bring next digit (6) of the dividend behind the 745 and repeat the process: 7456 / 816

Let's proceed to step 6:
If we divide 7456 by 816, we get 9 and a remainder of 112.
The number 9 becomes the next digit in our result. 
Result so far: 159.0
Subtract 7344 from 7456 to get 112.
Include the next digit (3) from the dividend after 112, then repeat: 1123 / 816

Going ahead to step 7:
816 goes into 1123 1 times with a remainder of 307.
The number 1 becomes the next digit in our result. 
Result so far: 1591.0
Subtracting 816 from 1123 leaves us with 307.
Grab the next digit (2) from the dividend, add it to 307, then carry on: 3072 / 816

Advancing to step 8:
816 goes into 3072 3 times with a remainder of 624.
Record the quotient 3 as the next digit in the result. 
Result so far: 15913.0
Subtracting 2448 from 3072 leaves us with 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Moving on to step 9:
816 goes into 6240 7 times with a remainder of 528.
Record the quotient 7 as the next digit in the result. 
Result so far: 15913.7
If we take 5712 away from 6240, we end up with 528.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5280, and continue the process.

Advancing to step 10:
816 can be fit into 5280 6 times, resulting in a remainder of 384.
Put 6 as the next digit of the answer. 
Result so far: 15913.76
If we take 4896 away from 5280, we end up with 384.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3840, and continue the process.

Let's proceed to step 11:
If we divide 3840 by 816, we get 4 and a remainder of 576.
Use 4 as the next digit of our solution. 
Result so far: 15913.764
Subtract 3264 from 3840 to get 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Going ahead to step 12:
5760 divided by 816 is 7 with a remainder of 48.
The number 7 becomes the next digit in our result. 
Result so far: 15913.7647
The remainder is 48 after subtracting 5712 from 5760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 13:
816 can be fit into 480 0 times, resulting in a remainder of 480.
The next digit of our result is 0. 
Result so far: 15913.7647
The remainder is 480 after subtracting 0 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 14:
The number 816 fits into 4800 5 times, leaving a remainder of 720.
Write down 5 as next digit of the result. 
Result so far: 15913.764705
If we take 4080 away from 4800, we end up with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

On to step 15:
816 goes into 7200 8 times with a remainder of 672.
The next digit of our result is 8. 
Result so far: 15913.7647058
Deduct 6528 from 7200 and we're left with 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Let's proceed to step 16:
6720 divided by 816 is 8 with a remainder of 192.
Put 8 as the next digit of the answer. 
Result so far: 15913.76470588
Deduct 6528 from 6720 and we're left with 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

In conclusion, the division gives 15913.76470588 with a balance of 1.92e-07.