We're dividing 151661 by 81 
We want to divide 151661 by 81.

Let's proceed to step 1:
The number 81 fits into 1 0 times, leaving a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Append the next digit (5) from the dividend to 1 and continue with: 15 / 81

Going ahead to step 2:
81 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 15, we end up with 15.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 81

Going ahead to step 3:
151 divided by 81 is 1 with a remainder of 70.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 70 after subtracting 81 from 151.
Include the next digit (6) from the dividend after 70, then repeat: 706 / 81

On to step 4:
81 goes into 706 8 times with a remainder of 58.
The next digit of our result is 8. 
Result so far: 18.0
Subtract 648 from 706 to get 58.
Append the next digit (6) from the dividend to 58 and continue with: 586 / 81

Going ahead to step 5:
586 divided by 81 is 7 with a remainder of 19.
Record the quotient 7 as the next digit in the result. 
Result so far: 187.0
If we take 567 away from 586, we end up with 19.
Bring next digit (1) of the dividend behind the 19 and repeat the process: 191 / 81

Moving on to step 6:
81 goes into 191 2 times with a remainder of 29.
Write down 2 as next digit of the result. 
Result so far: 1872.0
If we take 162 away from 191, we end up 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 7:
When dividing 290 by 81, we get 3 with a remainder of 47.
Record the quotient 3 as the next digit in the result. 
Result so far: 1872.3
The remainder is 47 after subtracting 243 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 8:
81 goes into 470 5 times with a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 1872.35
The remainder is 65 after subtracting 405 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Going ahead to step 9:
81 goes into 650 8 times with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 1872.358
If we take 648 away from 650, we end up 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.

Let's proceed to step 10:
When dividing 20 by 81, we get 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 1872.358
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
If we divide 200 by 81, we get 2 and a remainder of 38.
The number 2 becomes the next digit in our result. 
Result so far: 1872.35802
Subtract 162 from 200 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.

Moving on to step 12:
81 goes into 380 4 times with a remainder of 56.
The next digit of our result is 4. 
Result so far: 1872.358024
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.

Let's proceed to step 13:
81 can be fit into 560 6 times, resulting in a remainder of 74.
The next digit of our result is 6. 
Result so far: 1872.3580246
Deduct 486 from 560 and we're left with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

On to step 14:
81 goes into 740 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 1872.35802469
Subtract 729 from 740 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

The final outcome is 1872.35802469, with a leftover of 1.1e-08.