We're dividing 369571 by 21 
Our goal is to divide 369571 by 21.

Let's proceed to step 1:
When dividing 3 by 21, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (6) of the dividend behind the 3 and repeat the process: 36 / 21

Going ahead to step 2:
The number 21 fits into 36 1 times, leaving a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 21 from 36, we get 15.
Fetch the next digit (9) from the dividend, attach it to 15 and continue: 159 / 21

On to step 3:
The number 21 fits into 159 7 times, leaving a remainder of 12.
The next digit of our result is 7. 
Result so far: 17.0
If we subtract 147 from 159, we get 12.
Include the next digit (5) from the dividend after 12, then repeat: 125 / 21

Moving on to step 4:
The number 21 fits into 125 5 times, leaving a remainder of 20.
Write down 5 as next digit of the result. 
Result so far: 175.0
Subtracting 105 from 125 leaves us with 20.
Append the next digit (7) from the dividend to 20 and continue with: 207 / 21

Going ahead to step 5:
If we divide 207 by 21, we get 9 and a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 1759.0
The remainder is 18 after subtracting 189 from 207.
Include the next digit (1) from the dividend after 18, then repeat: 181 / 21

On to step 6:
If we divide 181 by 21, we get 8 and a remainder of 13.
The number 8 becomes the next digit in our result. 
Result so far: 17598.0
If we subtract 168 from 181, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
If we divide 130 by 21, we get 6 and a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 17598.6
Subtracting 126 from 130 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.

Going ahead to step 8:
If we divide 40 by 21, we get 1 and a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 17598.61
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 9:
If we divide 190 by 21, we get 9 and a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 17598.619
Subtract 189 from 190 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 10:
If we divide 10 by 21, we get 0 and a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 17598.619
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.

Advancing to step 11:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 17598.61904
Subtract 84 from 100 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
If we divide 160 by 21, we get 7 and a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 17598.619047
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 13:
130 divided by 21 is 6 with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 17598.6190476
Subtract 126 from 130 to get 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 14:
When dividing 40 by 21, we get 1 with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 17598.61904761
Subtracting 21 from 40 leaves us 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.

In conclusion, the division gives 17598.61904761 with a balance of 1.9e-08.