Let's divide 758864 by 21
Our goal is to divide 758864 by 21.

Step 1:
If we divide 7 by 21, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 21

On to step 2:
If we divide 75 by 21, we get 3 and a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 63 from 75 and we're left with 12.
Fetch the next digit (8) from the dividend, attach it to 12 and continue: 128 / 21

Let's proceed to step 3:
21 can be fit into 128 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 36.0
If we take 126 away from 128, we end up with 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 21

Going ahead to step 4:
When dividing 28 by 21, we get 1 with a remainder of 7.
Write down 1 as next digit of the result. 
Result so far: 361.0
The remainder is 7 after subtracting 21 from 28.
Include the next digit (6) from the dividend after 7, then repeat: 76 / 21

Moving on to step 5:
21 can be fit into 76 3 times, resulting in a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 3613.0
Deduct 63 from 76 and we're left with 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 21

On to step 6:
When dividing 134 by 21, we get 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 36136.0
Subtracting 126 from 134 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 7:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 36136.3
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 8:
When dividing 170 by 21, we get 8 with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 36136.38
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 9:
20 divided by 21 is 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 36136.38
If we subtract 0 from 20, we get 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 10:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 36136.3809
Subtract 189 from 200 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 11:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 36136.38095
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.

Moving on to step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 36136.380952
If we take 42 away from 50, we end up with 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 13:
If we divide 80 by 21, we get 3 and a remainder of 17.
The next digit of our result is 3. 
Result so far: 36136.3809523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 14:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 36136.38095238
Deduct 168 from 170 and we're left 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.

Our division results in 36136.38095238 with a remaining 2e-09.