Let's divide 412763 by 21
We're looking to find how many times 21 goes into 412763.

Moving on to step 1:
4 divided by 21 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 21

On to step 2:
21 goes into 41 1 times with a remainder of 20.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 21 from 41 to get 20.
Grab the next digit (2) from the dividend, add it to 20, then carry on: 202 / 21

Advancing to step 3:
When dividing 202 by 21, we get 9 with a remainder of 13.
The number 9 becomes the next digit in our result. 
Result so far: 19.0
If we take 189 away from 202, we end up with 13.
Fetch the next digit (7) from the dividend, attach it to 13 and continue: 137 / 21

Step 4:
137 divided by 21 is 6 with a remainder of 11.
Write down 6 as next digit of the result. 
Result so far: 196.0
Deduct 126 from 137 and we're left with 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 21

Going ahead to step 5:
116 divided by 21 is 5 with a remainder of 11.
Use 5 as the next digit of our solution. 
Result so far: 1965.0
Subtract 105 from 116 to get 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 21

On to step 6:
21 can be fit into 113 5 times, resulting in a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 19655.0
If we take 105 away from 113, 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.

Moving on to step 7:
If we divide 80 by 21, we get 3 and a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 19655.3
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.

Advancing to step 8:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 19655.38
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.

Moving on to step 9:
If we divide 20 by 21, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 19655.38
Deduct 0 from 20 and we're left 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.

Advancing to step 10:
When dividing 200 by 21, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 19655.3809
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.

Going ahead to step 11:
21 goes into 110 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 19655.38095
Deduct 105 from 110 and we're left 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 12:
21 can be fit into 50 2 times, resulting in a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 19655.380952
The remainder is 8 after subtracting 42 from 50.
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:
80 divided by 21 is 3 with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 19655.3809523
Deduct 63 from 80 and we're left 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.

Moving on to step 14:
When dividing 170 by 21, we get 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 19655.38095238
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.

The final outcome is 19655.38095238, with a leftover of 2e-09.