Let's divide 319598 by 21
Our goal is to divide 319598 by 21.

Step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 21

Advancing to step 2:
The number 21 fits into 31 1 times, leaving a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 21 from 31 and we're left with 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 21

Advancing to step 3:
When dividing 109 by 21, we get 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 15.0
The remainder is 4 after subtracting 105 from 109.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 21

Moving on to step 4:
45 divided by 21 is 2 with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 152.0
If we take 42 away from 45, we end up with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 21

On to step 5:
39 divided by 21 is 1 with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1521.0
Subtracting 21 from 39 leaves us with 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 21

Advancing to step 6:
When dividing 188 by 21, we get 8 with a remainder of 20.
The next digit of our result is 8. 
Result so far: 15218.0
Subtracting 168 from 188 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.

Going ahead to step 7:
If we divide 200 by 21, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 15218.9
Subtracting 189 from 200 leaves us 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.

Moving on to step 8:
21 goes into 110 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 15218.95
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.

Let's proceed to step 9:
21 goes into 50 2 times with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 15218.952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 15218.9523
If we subtract 63 from 80, we get 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 11:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 15218.95238
If we take 168 away from 170, 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.

On to step 12:
20 divided by 21 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 15218.95238
If we take 0 away from 20, we end up 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 13:
If we divide 200 by 21, we get 9 and a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 15218.9523809
If we take 189 away from 200, 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.

Moving on to step 14:
110 divided by 21 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 15218.95238095
Subtracting 105 from 110 leaves us 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.

After the division, we end up with 15218.95238095 and a remainder of 5e-09.