318907 divided by 21 
We want to divide 318907 by 21.

On to step 1:
When dividing 3 by 21, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (1) of the dividend behind the 3 and repeat the process: 31 / 21

On to step 2:
21 can be fit into 31 1 times, resulting in 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.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 21

Let's proceed to step 3:
When dividing 108 by 21, we get 5 with a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 15.0
The remainder is 3 after subtracting 105 from 108.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 21

Step 4:
21 goes into 39 1 times with a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 151.0
Subtracting 21 from 39 leaves us with 18.
Include the next digit (0) from the dividend after 18, then repeat: 180 / 21

Going ahead to step 5:
21 can be fit into 180 8 times, resulting in a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 1518.0
Deduct 168 from 180 and we're left with 12.
Fetch the next digit (7) from the dividend, attach it to 12 and continue: 127 / 21

On to step 6:
21 goes into 127 6 times with a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 15186.0
The remainder is 1 after subtracting 126 from 127.
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:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 15186.0
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.

Going ahead to step 8:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 15186.04
Deduct 84 from 100 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
If we divide 160 by 21, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 15186.047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 10:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 15186.0476
The remainder is 4 after subtracting 126 from 130.
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 11:
The number 21 fits into 40 1 times, leaving a remainder of 19.
The next digit of our result is 1. 
Result so far: 15186.04761
Deduct 21 from 40 and we're left 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.

Step 12:
21 goes into 190 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 15186.047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 13:
21 goes into 10 0 times with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 15186.047619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 14:
21 goes into 100 4 times with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 15186.04761904
If we take 84 away from 100, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

In conclusion, the division gives 15186.04761904 with a balance of 1.6e-08.