13210646 ÷ 81 
Our goal is to divide 13210646 by 81.

On to step 1:
If we divide 1 by 81, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (3) from the dividend and append it to 1, then repeat: 13 / 81

Moving on to step 2:
The number 81 fits into 13 0 times, leaving a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Take the next digit (2) from the dividend and append it to 13, then repeat: 132 / 81

Moving on to step 3:
The number 81 fits into 132 1 times, leaving a remainder of 51.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 51 after subtracting 81 from 132.
Append the next digit (1) from the dividend to 51 and continue with: 511 / 81

Going ahead to step 4:
511 divided by 81 is 6 with a remainder of 25.
Write down 6 as next digit of the result. 
Result so far: 16.0
The remainder is 25 after subtracting 486 from 511.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 81

Going ahead to step 5:
81 can be fit into 250 3 times, resulting in a remainder of 7.
Put 3 as the next digit of the answer. 
Result so far: 163.0
Deduct 243 from 250 and we're left with 7.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 81

Let's proceed to step 6:
76 divided by 81 is 0 with a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 1630.0
Subtracting 0 from 76 leaves us with 76.
Fetch the next digit (4) from the dividend, attach it to 76 and continue: 764 / 81

Advancing to step 7:
81 goes into 764 9 times with a remainder of 35.
The number 9 becomes the next digit in our result. 
Result so far: 16309.0
The remainder is 35 after subtracting 729 from 764.
Bring next digit (6) of the dividend behind the 35 and repeat the process: 356 / 81

Advancing to step 8:
356 divided by 81 is 4 with a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 163094.0
Subtract 324 from 356 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 9:
If we divide 320 by 81, we get 3 and a remainder of 77.
Put 3 as the next digit of the answer. 
Result so far: 163094.3
Subtracting 243 from 320 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Advancing to step 10:
When dividing 770 by 81, we get 9 with a remainder of 41.
The number 9 becomes the next digit in our result. 
Result so far: 163094.39
Deduct 729 from 770 and we're left with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 11:
The number 81 fits into 410 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 163094.395
Subtract 405 from 410 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 12:
The number 81 fits into 50 0 times, leaving a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 163094.395
If we take 0 away from 50, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 13:
500 divided by 81 is 6 with a remainder of 14.
Record the quotient 6 as the next digit in the result. 
Result so far: 163094.39506
If we subtract 486 from 500, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 14:
81 can be fit into 140 1 times, resulting in a remainder of 59.
Use 1 as the next digit of our solution. 
Result so far: 163094.395061
The remainder is 59 after subtracting 81 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 15:
81 goes into 590 7 times with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 163094.3950617
If we subtract 567 from 590, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

On to step 16:
The number 81 fits into 230 2 times, leaving a remainder of 68.
Use 2 as the next digit of our solution. 
Result so far: 163094.39506172
Subtract 162 from 230 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

The quotient of the division is 163094.39506172, and the remainder is 6.8e-08.