3021875 divided by 21 
We want to figure out the number of times 3021875 can be divided by 21.

On to step 1:
21 goes into 3 0 times with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 21

Let's proceed to step 2:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 9 after subtracting 21 from 30.
Grab the next digit (2) from the dividend, add it to 9, then carry on: 92 / 21

Moving on to step 3:
The number 21 fits into 92 4 times, leaving a remainder of 8.
The next digit of our result is 4. 
Result so far: 14.0
Subtracting 84 from 92 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 21

On to step 4:
21 goes into 81 3 times with a remainder of 18.
Write down 3 as next digit of the result. 
Result so far: 143.0
The remainder is 18 after subtracting 63 from 81.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 21

Going ahead to step 5:
The number 21 fits into 188 8 times, leaving a remainder of 20.
Write down 8 as next digit of the result. 
Result so far: 1438.0
Deduct 168 from 188 and we're left with 20.
Fetch the next digit (7) from the dividend, attach it to 20 and continue: 207 / 21

On to step 6:
If we divide 207 by 21, we get 9 and a remainder of 18.
Write down 9 as next digit of the result. 
Result so far: 14389.0
If we take 189 away from 207, we end up with 18.
Grab the next digit (5) from the dividend, add it to 18, then carry on: 185 / 21

On to step 7:
The number 21 fits into 185 8 times, leaving a remainder of 17.
Put 8 as the next digit of the answer. 
Result so far: 143898.0
If we subtract 168 from 185, we get 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:
If we divide 170 by 21, we get 8 and a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 143898.8
The remainder is 2 after subtracting 168 from 170.
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.
Write down 0 as next digit of the result. 
Result so far: 143898.8
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.

On to step 10:
The number 21 fits into 200 9 times, leaving a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 143898.809
If we take 189 away from 200, we end up with 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.
Record the quotient 5 as the next digit in the result. 
Result so far: 143898.8095
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.

Step 12:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 143898.80952
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 13:
The number 21 fits into 80 3 times, leaving a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 143898.809523
If we subtract 63 from 80, we get 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 14:
170 divided by 21 is 8 with a remainder of 2.
The next digit of our result is 8. 
Result so far: 143898.8095238
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.

Moving on to step 15:
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: 143898.8095238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 143898.8095238 with a balance of 2e-08.