Let's divide 421200 by 57
Our goal is to divide 421200 by 57.

Moving on to step 1:
If we divide 4 by 57, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 57

Step 2:
The number 57 fits into 42 0 times, leaving a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 57

Advancing to step 3:
57 goes into 421 7 times with a remainder of 22.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
The remainder is 22 after subtracting 399 from 421.
Fetch the next digit (2) from the dividend, attach it to 22 and continue: 222 / 57

Step 4:
If we divide 222 by 57, we get 3 and a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 73.0
Subtracting 171 from 222 leaves us with 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 57

Advancing to step 5:
57 can be fit into 510 8 times, resulting in a remainder of 54.
Put 8 as the next digit of the answer. 
Result so far: 738.0
Subtracting 456 from 510 leaves us with 54.
Take the next digit (0) from the dividend and append it to 54, then repeat: 540 / 57

Let's proceed to step 6:
57 goes into 540 9 times with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 7389.0
Subtracting 513 from 540 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Let's proceed to step 7:
57 can be fit into 270 4 times, resulting in a remainder of 42.
Write down 4 as next digit of the result. 
Result so far: 7389.4
The remainder is 42 after subtracting 228 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
The number 57 fits into 420 7 times, leaving a remainder of 21.
The next digit of our result is 7. 
Result so far: 7389.47
Subtract 399 from 420 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Let's proceed to step 9:
If we divide 210 by 57, we get 3 and a remainder of 39.
Put 3 as the next digit of the answer. 
Result so far: 7389.473
Subtract 171 from 210 to get 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 10:
57 can be fit into 390 6 times, resulting in a remainder of 48.
The next digit of our result is 6. 
Result so far: 7389.4736
Subtract 342 from 390 to get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Advancing to step 11:
When dividing 480 by 57, we get 8 with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 7389.47368
If we take 456 away from 480, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
When dividing 240 by 57, we get 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 7389.473684
Subtracting 228 from 240 leaves us 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.

Moving on to step 13:
If we divide 120 by 57, we get 2 and a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 7389.4736842
Deduct 114 from 120 and we're left 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.

On to step 14:
60 divided by 57 is 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 7389.47368421
If we take 57 away from 60, we end up with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 7389.47368421 with a remainder of 3e-09.