We're dividing 401221 by 81 
We want to figure out the number of times 401221 can be divided by 81.

On to step 1:
If we divide 4 by 81, we get 0 and a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 81

Let's proceed to step 2:
81 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Include the next digit (1) from the dividend after 40, then repeat: 401 / 81

Let's proceed to step 3:
If we divide 401 by 81, we get 4 and a remainder of 77.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we take 324 away from 401, we end up with 77.
Take the next digit (2) from the dividend and append it to 77, then repeat: 772 / 81

Moving on to step 4:
772 divided by 81 is 9 with a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 49.0
Deduct 729 from 772 and we're left with 43.
Take the next digit (2) from the dividend and append it to 43, then repeat: 432 / 81

Step 5:
81 goes into 432 5 times with a remainder of 27.
Record the quotient 5 as the next digit in the result. 
Result so far: 495.0
Subtracting 405 from 432 leaves us with 27.
Grab the next digit (1) from the dividend, add it to 27, then carry on: 271 / 81

Moving on to step 6:
271 divided by 81 is 3 with a remainder of 28.
The number 3 becomes the next digit in our result. 
Result so far: 4953.0
Deduct 243 from 271 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 7:
If we divide 280 by 81, we get 3 and a remainder of 37.
The next digit of our result is 3. 
Result so far: 4953.3
If we subtract 243 from 280, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Moving on to step 8:
If we divide 370 by 81, we get 4 and a remainder of 46.
Use 4 as the next digit of our solution. 
Result so far: 4953.34
If we take 324 away from 370, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Advancing to step 9:
If we divide 460 by 81, we get 5 and a remainder of 55.
Record the quotient 5 as the next digit in the result. 
Result so far: 4953.345
Subtract 405 from 460 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Advancing to step 10:
If we divide 550 by 81, we get 6 and a remainder of 64.
The number 6 becomes the next digit in our result. 
Result so far: 4953.3456
The remainder is 64 after subtracting 486 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 11:
81 goes into 640 7 times with a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 4953.34567
If we take 567 away from 640, we end up with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 12:
81 can be fit into 730 9 times, resulting in a remainder of 1.
Use 9 as the next digit of our solution. 
Result so far: 4953.345679
If we subtract 729 from 730, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 13:
When dividing 10 by 81, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 4953.345679
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 14:
If we divide 100 by 81, we get 1 and a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 4953.34567901
Deduct 81 from 100 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 4953.34567901, with a leftover of 1.9e-08.