We're dividing 641026 by 21 
We're looking to find how many times 21 goes into 641026.

Step 1:
The number 21 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 21

Advancing to step 2:
When dividing 64 by 21, we get 3 with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 63 away from 64, we end up with 1.
Append the next digit (1) from the dividend to 1 and continue with: 11 / 21

Moving on to step 3:
When dividing 11 by 21, we get 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 30.0
If we take 0 away from 11, we end up with 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 21

Advancing to step 4:
If we divide 110 by 21, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 305.0
Subtract 105 from 110 to get 5.
Grab the next digit (2) from the dividend, add it to 5, then carry on: 52 / 21

Advancing to step 5:
21 can be fit into 52 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 3052.0
Subtract 42 from 52 to get 10.
Append the next digit (6) from the dividend to 10 and continue with: 106 / 21

Moving on to step 6:
21 can be fit into 106 5 times, resulting in a remainder of 1.
The number 5 becomes the next digit in our result. 
Result so far: 30525.0
The remainder is 1 after subtracting 105 from 106.
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 7:
If we divide 10 by 21, we get 0 and a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 30525.0
If we take 0 away from 10, we end up 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.

Let's proceed to step 8:
100 divided by 21 is 4 with a remainder of 16.
The next digit of our result is 4. 
Result so far: 30525.04
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.

Step 9:
If we divide 160 by 21, we get 7 and a remainder of 13.
The next digit of our result is 7. 
Result so far: 30525.047
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.

Advancing 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: 30525.0476
If we take 126 away from 130, we end up 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.

Moving on to step 11:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 30525.04761
If we subtract 21 from 40, 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.

Let's proceed to step 12:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 30525.047619
The remainder is 1 after subtracting 189 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 13:
When dividing 10 by 21, we get 0 with a remainder of 10.
The next digit of our result is 0. 
Result so far: 30525.047619
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.

Advancing to step 14:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 30525.04761904
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.

Our division results in 30525.04761904 with a remaining 1.6e-08.