We divide 155639 by 81
We want to figure out the number of times 155639 can be divided by 81.

Moving on to step 1:
The number 81 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 81

Going ahead to step 2:
The number 81 fits into 15 0 times, leaving a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Fetch the next digit (5) from the dividend, attach it to 15 and continue: 155 / 81

Step 3:
155 divided by 81 is 1 with a remainder of 74.
The next digit of our result is 1. 
Result so far: 1.0
If we take 81 away from 155, we end up with 74.
Bring next digit (6) of the dividend behind the 74 and repeat the process: 746 / 81

Step 4:
When dividing 746 by 81, we get 9 with a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Subtract 729 from 746 to get 17.
Append the next digit (3) from the dividend to 17 and continue with: 173 / 81

Let's proceed to step 5:
If we divide 173 by 81, we get 2 and a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 192.0
Deduct 162 from 173 and we're left with 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 81

Step 6:
When dividing 119 by 81, we get 1 with a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 1921.0
Subtract 81 from 119 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 7:
If we divide 380 by 81, we get 4 and a remainder of 56.
Use 4 as the next digit of our solution. 
Result so far: 1921.4
If we take 324 away from 380, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 8:
If we divide 560 by 81, we get 6 and a remainder of 74.
Write down 6 as next digit of the result. 
Result so far: 1921.46
Subtract 486 from 560 to get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 9:
81 can be fit into 740 9 times, resulting in a remainder of 11.
The next digit of our result is 9. 
Result so far: 1921.469
If we take 729 away from 740, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 10:
When dividing 110 by 81, we get 1 with a remainder of 29.
Use 1 as the next digit of our solution. 
Result so far: 1921.4691
Deduct 81 from 110 and we're left with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 11:
81 goes into 290 3 times with a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 1921.46913
Deduct 243 from 290 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 12:
470 divided by 81 is 5 with a remainder of 65.
Put 5 as the next digit of the answer. 
Result so far: 1921.469135
If we subtract 405 from 470, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 13:
The number 81 fits into 650 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 1921.4691358
Deduct 648 from 650 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
When dividing 20 by 81, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 1921.4691358
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 1921.4691358 with a remainder of 2e-08.