Let's divide 152582 by 21
We want to divide 152582 by 21.

Advancing to step 1:
When dividing 1 by 21, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 21

Advancing to step 2:
21 goes into 15 0 times with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 15 and we're left with 15.
Include the next digit (2) from the dividend after 15, then repeat: 152 / 21

On to step 3:
21 goes into 152 7 times with a remainder of 5.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 5 after subtracting 147 from 152.
Append the next digit (5) from the dividend to 5 and continue with: 55 / 21

Step 4:
21 goes into 55 2 times with a remainder of 13.
The next digit of our result is 2. 
Result so far: 72.0
Subtracting 42 from 55 leaves us with 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 21

Step 5:
138 divided by 21 is 6 with a remainder of 12.
Write down 6 as next digit of the result. 
Result so far: 726.0
Subtracting 126 from 138 leaves us with 12.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 21

Step 6:
21 can be fit into 122 5 times, resulting in a remainder of 17.
The number 5 becomes the next digit in our result. 
Result so far: 7265.0
If we take 105 away from 122, we end up with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 7:
When dividing 170 by 21, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 7265.8
The remainder is 2 after subtracting 168 from 170.
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:
When dividing 20 by 21, we get 0 with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 7265.8
Deduct 0 from 20 and we're left 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.

Going ahead to step 9:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The next digit of our result is 9. 
Result so far: 7265.809
The remainder is 11 after subtracting 189 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Let's proceed to step 10:
110 divided by 21 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 7265.8095
If we take 105 away from 110, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 11:
If we divide 50 by 21, we get 2 and a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 7265.80952
Subtracting 42 from 50 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 7265.809523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
170 divided by 21 is 8 with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 7265.8095238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 14:
The number 21 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 7265.8095238
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.

The final outcome is 7265.8095238, with a leftover of 2e-08.