We look at the division of 915703 by 21 
We're looking to find how many times 21 goes into 915703.

Step 1:
21 goes into 9 0 times 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.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 21

Let's proceed to step 2:
If we divide 91 by 21, we get 4 and a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we subtract 84 from 91, we get 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 21

On to step 3:
If we divide 75 by 21, we get 3 and a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 43.0
The remainder is 12 after subtracting 63 from 75.
Append the next digit (7) from the dividend to 12 and continue with: 127 / 21

On to step 4:
21 goes into 127 6 times with a remainder of 1.
The next digit of our result is 6. 
Result so far: 436.0
Subtracting 126 from 127 leaves us with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 21

Moving on to step 5:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 4360.0
The remainder is 10 after subtracting 0 from 10.
Append the next digit (3) from the dividend to 10 and continue with: 103 / 21

Moving on to step 6:
When dividing 103 by 21, we get 4 with a remainder of 19.
Use 4 as the next digit of our solution. 
Result so far: 43604.0
If we subtract 84 from 103, we 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 7:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 43604.9
If we subtract 189 from 190, we 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.

On to step 8:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 43604.9
The remainder is 10 after subtracting 0 from 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 9:
If we divide 100 by 21, we get 4 and a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 43604.904
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.

On to step 10:
21 goes into 160 7 times with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 43604.9047
The remainder is 13 after subtracting 147 from 160.
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 11:
21 goes into 130 6 times with a remainder of 4.
Record the quotient 6 as the next digit in the result. 
Result so far: 43604.90476
If we subtract 126 from 130, we 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 12:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 43604.904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 13:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 43604.9047619
If we take 189 away from 190, we end up 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 14:
21 can be fit into 10 0 times, resulting in a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 43604.9047619
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.

Our division results in 43604.9047619 with a remaining 1e-08.