We look at the division of 783403 by 81 
We're looking to find how many times 81 goes into 783403.

Step 1:
When dividing 7 by 81, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 81

Let's proceed to step 2:
81 can be fit into 78 0 times, resulting in a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Include the next digit (3) from the dividend after 78, then repeat: 783 / 81

Advancing to step 3:
81 can be fit into 783 9 times, resulting in a remainder of 54.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 729 from 783, we get 54.
Fetch the next digit (4) from the dividend, attach it to 54 and continue: 544 / 81

Advancing to step 4:
81 goes into 544 6 times with a remainder of 58.
Write down 6 as next digit of the result. 
Result so far: 96.0
Subtracting 486 from 544 leaves us with 58.
Bring next digit (0) of the dividend behind the 58 and repeat the process: 580 / 81

Step 5:
81 can be fit into 580 7 times, resulting in a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 967.0
If we subtract 567 from 580, we get 13.
Bring next digit (3) of the dividend behind the 13 and repeat the process: 133 / 81

Step 6:
When dividing 133 by 81, we get 1 with a remainder of 52.
Write down 1 as next digit of the result. 
Result so far: 9671.0
The remainder is 52 after subtracting 81 from 133.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
81 can be fit into 520 6 times, resulting in a remainder of 34.
Record the quotient 6 as the next digit in the result. 
Result so far: 9671.6
If we take 486 away from 520, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 8:
81 can be fit into 340 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 9671.64
If we subtract 324 from 340, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
If we divide 160 by 81, we get 1 and a remainder of 79.
The next digit of our result is 1. 
Result so far: 9671.641
Subtracting 81 from 160 leaves us with 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 10:
The number 81 fits into 790 9 times, leaving a remainder of 61.
Write down 9 as next digit of the result. 
Result so far: 9671.6419
If we subtract 729 from 790, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Moving on to step 11:
610 divided by 81 is 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 9671.64197
If we subtract 567 from 610, we get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Advancing to step 12:
81 can be fit into 430 5 times, resulting in a remainder of 25.
Put 5 as the next digit of the answer. 
Result so far: 9671.641975
Subtract 405 from 430 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 13:
If we divide 250 by 81, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 9671.6419753
Deduct 243 from 250 and we're left with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 14:
If we divide 70 by 81, we get 0 and a remainder of 70.
Use 0 as the next digit of our solution. 
Result so far: 9671.6419753
If we subtract 0 from 70, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

After the division, we end up with 9671.6419753 and a remainder of 7e-08.