Let's divide 57124913 by 21
Our goal is to divide 57124913 by 21.

Moving on to step 1:
21 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 21

Advancing to step 2:
When dividing 57 by 21, we get 2 with a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 42 away from 57, we end up with 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 21

Advancing to step 3:
The number 21 fits into 151 7 times, leaving a remainder of 4.
The number 7 becomes the next digit in our result. 
Result so far: 27.0
Subtract 147 from 151 to get 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 21

Let's proceed to step 4:
The number 21 fits into 42 2 times, leaving a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 272.0
Deduct 42 from 42 and we're left with 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 21

Going ahead to step 5:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 2720.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (9) from the dividend to 4 and continue with: 49 / 21

Moving on to step 6:
49 divided by 21 is 2 with a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 27202.0
If we take 42 away from 49, we end up with 7.
Take the next digit (1) from the dividend and append it to 7, then repeat: 71 / 21

Let's proceed to step 7:
When dividing 71 by 21, we get 3 with a remainder of 8.
Put 3 as the next digit of the answer. 
Result so far: 272023.0
If we subtract 63 from 71, we get 8.
Fetch the next digit (3) from the dividend, attach it to 8 and continue: 83 / 21

Moving on to step 8:
The number 21 fits into 83 3 times, leaving a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 2720233.0
If we subtract 63 from 83, 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.

Moving on to step 9:
21 goes into 200 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 2720233.9
The remainder is 11 after subtracting 189 from 200.
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 10:
21 can be fit into 110 5 times, resulting in a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 2720233.95
If we take 105 away from 110, we end up 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 11:
The number 21 fits into 50 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 2720233.952
Subtracting 42 from 50 leaves us 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 12:
When dividing 80 by 21, we get 3 with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 2720233.9523
Subtract 63 from 80 to 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.

Let's proceed to step 13:
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: 2720233.95238
If we take 168 away from 170, we end up 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.

Let's proceed to step 14:
20 divided by 21 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 2720233.95238
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.

Step 15:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 2720233.9523809
If we subtract 189 from 200, we 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.

Moving on to step 16:
The number 21 fits into 110 5 times, leaving a remainder of 5.
The next digit of our result is 5. 
Result so far: 2720233.95238095
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.

The final result is 2720233.95238095 with a remainder of 5e-09.