We look at the division of 158121 by 8 
Our goal is to divide 158121 by 8.

Going ahead to step 1:
The number 8 fits into 1 0 times, leaving a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 8

Step 2:
8 goes into 15 1 times with a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
If we take 8 away from 15, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 8

On to step 3:
78 divided by 8 is 9 with a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 19.0
Deduct 72 from 78 and we're left with 6.
Grab the next digit (1) from the dividend, add it to 6, then carry on: 61 / 8

Going ahead to step 4:
61 divided by 8 is 7 with a remainder of 5.
The next digit of our result is 7. 
Result so far: 197.0
Subtract 56 from 61 to get 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 8

On to step 5:
If we divide 52 by 8, we get 6 and a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 1976.0
The remainder is 4 after subtracting 48 from 52.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 8

Moving on to step 6:
8 goes into 41 5 times with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 19765.0
Subtract 40 from 41 to 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.

Moving on to step 7:
8 goes into 10 1 times with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 19765.1
If we take 8 away from 10, 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.

Moving on to step 8:
20 divided by 8 is 2 with a remainder of 4.
Put 2 as the next digit of the answer. 
Result so far: 19765.12
Subtracting 16 from 20 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 9:
The number 8 fits into 40 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 19765.125
Subtract 40 from 40 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 10:
0 divided by 8 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 19765.125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 11:
0 divided by 8 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 19765.125
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 19765.125 with a balance of 0.0.