We divide 610383 by 21
We want to figure out the number of times 610383 can be divided by 21.

Step 1:
When dividing 6 by 21, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (1) from the dividend after 6, then repeat: 61 / 21

Moving on to step 2:
When dividing 61 by 21, we get 2 with a remainder of 19.
Put 2 as the next digit of the answer. 
Result so far: 2.0
The remainder is 19 after subtracting 42 from 61.
Grab the next digit (0) from the dividend, add it to 19, then carry on: 190 / 21

Step 3:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 29.0
Deduct 189 from 190 and we're left with 1.
Grab the next digit (3) from the dividend, add it to 1, then carry on: 13 / 21

Going ahead to step 4:
13 divided by 21 is 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 290.0
If we take 0 away from 13, we end up with 13.
Take the next digit (8) from the dividend and append it to 13, then repeat: 138 / 21

Going ahead to step 5:
138 divided by 21 is 6 with a remainder of 12.
Record the quotient 6 as the next digit in the result. 
Result so far: 2906.0
If we take 126 away from 138, we end up with 12.
Grab the next digit (3) from the dividend, add it to 12, then carry on: 123 / 21

Advancing to step 6:
123 divided by 21 is 5 with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 29065.0
If we subtract 105 from 123, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
21 can be fit into 180 8 times, resulting in a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 29065.8
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 29065.85
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
21 can be fit into 150 7 times, resulting in a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 29065.857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 10:
If we divide 30 by 21, we get 1 and a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 29065.8571
If we subtract 21 from 30, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 11:
21 can be fit into 90 4 times, resulting in a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 29065.85714
If we take 84 away from 90, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 12:
The number 21 fits into 60 2 times, leaving a remainder of 18.
Record the quotient 2 as the next digit in the result. 
Result so far: 29065.857142
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 13:
180 divided by 21 is 8 with a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 29065.8571428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
If we divide 120 by 21, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 29065.85714285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

After the division, we end up with 29065.85714285 and a remainder of 1.5e-08.