We're dividing 908515 by 21 
Let's see how many times 21 fits into 908515.

Let's proceed to step 1:
9 divided by 21 is 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 21

Advancing to step 2:
21 goes into 90 4 times with a remainder of 6.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 84 away from 90, we end up with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 21

Moving on to step 3:
68 divided by 21 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 43.0
Subtract 63 from 68 to get 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 21

Advancing to step 4:
21 can be fit into 55 2 times, resulting in a remainder of 13.
Write down 2 as next digit of the result. 
Result so far: 432.0
Deduct 42 from 55 and we're left with 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 21

Let's proceed to step 5:
21 can be fit into 131 6 times, resulting in a remainder of 5.
Record the quotient 6 as the next digit in the result. 
Result so far: 4326.0
Deduct 126 from 131 and we're left with 5.
Include the next digit (5) from the dividend after 5, then repeat: 55 / 21

Let's proceed to step 6:
If we divide 55 by 21, we get 2 and a remainder of 13.
The next digit of our result is 2. 
Result so far: 43262.0
If we take 42 away from 55, 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 7:
When dividing 130 by 21, we get 6 with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 43262.6
Deduct 126 from 130 and we're left 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.

Step 8:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 43262.61
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.

Moving on to step 9:
When dividing 190 by 21, we get 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 43262.619
Deduct 189 from 190 and we're left 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.

Moving on to step 10:
21 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 43262.619
Subtracting 0 from 10 leaves us 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.

Step 11:
When dividing 100 by 21, we get 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 43262.61904
If we subtract 84 from 100, we 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.

Step 12:
160 divided by 21 is 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 43262.619047
Deduct 147 from 160 and we're left 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.

Advancing to step 13:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 43262.6190476
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.

Moving on to step 14:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 43262.61904761
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.

The final outcome is 43262.61904761, with a leftover of 1.9e-08.