641461 ÷ 21 
We want to figure out the number of times 641461 can be divided by 21.

On to step 1:
6 divided by 21 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 21

Step 2:
21 goes into 64 3 times with a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 1 after subtracting 63 from 64.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 21

Moving on to step 3:
When dividing 11 by 21, we get 0 with a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Deduct 0 from 11 and we're left with 11.
Take the next digit (4) from the dividend and append it to 11, then repeat: 114 / 21

Let's proceed to step 4:
114 divided by 21 is 5 with a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 305.0
Deduct 105 from 114 and we're left with 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 21

Step 5:
21 goes into 96 4 times with a remainder of 12.
Use 4 as the next digit of our solution. 
Result so far: 3054.0
Deduct 84 from 96 and we're left with 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 21

Advancing to step 6:
If we divide 121 by 21, we get 5 and a remainder of 16.
The next digit of our result is 5. 
Result so far: 30545.0
The remainder is 16 after subtracting 105 from 121.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 7:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 30545.7
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.

Let's proceed to step 8:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 30545.76
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.

Going ahead to step 9:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Use 1 as the next digit of our solution. 
Result so far: 30545.761
If we take 21 away from 40, we end up 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.

Advancing to step 10:
If we divide 190 by 21, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 30545.7619
Subtract 189 from 190 to 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.

Moving on to step 11:
When dividing 10 by 21, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 30545.7619
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.

Going ahead to step 12:
100 divided by 21 is 4 with a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 30545.761904
Subtract 84 from 100 to 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.

Let's proceed to step 13:
21 can be fit into 160 7 times, resulting in a remainder of 13.
The next digit of our result is 7. 
Result so far: 30545.7619047
Subtracting 147 from 160 leaves us 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.

Step 14:
21 can be fit into 130 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 30545.76190476
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.

The final outcome is 30545.76190476, with a leftover of 4e-09.