80359643 ÷ 816 
We want to divide 80359643 by 816.

Step 1:
8 divided by 816 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 816

Let's proceed to step 2:
816 can be fit into 80 0 times, resulting in a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 80 and we're left with 80.
Take the next digit (3) from the dividend and append it to 80, then repeat: 803 / 816

Step 3:
If we divide 803 by 816, we get 0 and a remainder of 803.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 803 to get 803.
Grab the next digit (5) from the dividend, add it to 803, then carry on: 8035 / 816

On to step 4:
The number 816 fits into 8035 9 times, leaving a remainder of 691.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 691 after subtracting 7344 from 8035.
Bring next digit (9) of the dividend behind the 691 and repeat the process: 6919 / 816

Step 5:
816 can be fit into 6919 8 times, resulting in a remainder of 391.
Write down 8 as next digit of the result. 
Result so far: 98.0
If we take 6528 away from 6919, we end up with 391.
Bring next digit (6) of the dividend behind the 391 and repeat the process: 3916 / 816

Moving on to step 6:
The number 816 fits into 3916 4 times, leaving a remainder of 652.
Record the quotient 4 as the next digit in the result. 
Result so far: 984.0
Deduct 3264 from 3916 and we're left with 652.
Bring next digit (4) of the dividend behind the 652 and repeat the process: 6524 / 816

On to step 7:
6524 divided by 816 is 7 with a remainder of 812.
Write down 7 as next digit of the result. 
Result so far: 9847.0
If we take 5712 away from 6524, we end up with 812.
Take the next digit (3) from the dividend and append it to 812, then repeat: 8123 / 816

Step 8:
When dividing 8123 by 816, we get 9 with a remainder of 779.
The number 9 becomes the next digit in our result. 
Result so far: 98479.0
If we take 7344 away from 8123, we end up with 779.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7790, and continue the process.

On to step 9:
When dividing 7790 by 816, we get 9 with a remainder of 446.
Put 9 as the next digit of the answer. 
Result so far: 98479.9
Subtracting 7344 from 7790 leaves us with 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

Moving on to step 10:
4460 divided by 816 is 5 with a remainder of 380.
The number 5 becomes the next digit in our result. 
Result so far: 98479.95
If we subtract 4080 from 4460, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Step 11:
When dividing 3800 by 816, we get 4 with a remainder of 536.
Write down 4 as next digit of the result. 
Result so far: 98479.954
Subtract 3264 from 3800 to get 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Advancing to step 12:
816 goes into 5360 6 times with a remainder of 464.
Put 6 as the next digit of the answer. 
Result so far: 98479.9546
The remainder is 464 after subtracting 4896 from 5360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

On to step 13:
816 goes into 4640 5 times with a remainder of 560.
The next digit of our result is 5. 
Result so far: 98479.95465
The remainder is 560 after subtracting 4080 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Going ahead to step 14:
816 can be fit into 5600 6 times, resulting in a remainder of 704.
The number 6 becomes the next digit in our result. 
Result so far: 98479.954656
If we take 4896 away from 5600, we end up with 704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7040, and continue the process.

Let's proceed to step 15:
816 can be fit into 7040 8 times, resulting in a remainder of 512.
Record the quotient 8 as the next digit in the result. 
Result so far: 98479.9546568
Deduct 6528 from 7040 and we're left with 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Going ahead to step 16:
When dividing 5120 by 816, we get 6 with a remainder of 224.
The next digit of our result is 6. 
Result so far: 98479.95465686
Subtract 4896 from 5120 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Our division results in 98479.95465686 with a remaining 2.24e-07.