420339 divided by 57 
Let's see how many times 57 fits into 420339.

Going ahead to step 1:
57 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 57

On to step 2:
When dividing 42 by 57, we get 0 with 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.
Fetch the next digit (0) from the dividend, attach it to 42 and continue: 420 / 57

Going ahead to step 3:
57 can be fit into 420 7 times, resulting in a remainder of 21.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 399 away from 420, we end up with 21.
Include the next digit (3) from the dividend after 21, then repeat: 213 / 57

Advancing to step 4:
When dividing 213 by 57, we get 3 with a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 73.0
If we subtract 171 from 213, we get 42.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 57

Going ahead to step 5:
57 can be fit into 423 7 times, resulting in a remainder of 24.
Record the quotient 7 as the next digit in the result. 
Result so far: 737.0
If we take 399 away from 423, we end up with 24.
Take the next digit (9) from the dividend and append it to 24, then repeat: 249 / 57

Let's proceed to step 6:
When dividing 249 by 57, we get 4 with a remainder of 21.
The next digit of our result is 4. 
Result so far: 7374.0
If we take 228 away from 249, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
210 divided by 57 is 3 with a remainder of 39.
Use 3 as the next digit of our solution. 
Result so far: 7374.3
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.

Going ahead to step 8:
When dividing 390 by 57, we get 6 with a remainder of 48.
The next digit of our result is 6. 
Result so far: 7374.36
If we take 342 away from 390, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 9:
57 can be fit into 480 8 times, resulting in a remainder of 24.
Use 8 as the next digit of our solution. 
Result so far: 7374.368
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.

Advancing to step 10:
57 can be fit into 240 4 times, resulting in a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 7374.3684
If we subtract 228 from 240, 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.

Advancing to step 11:
57 can be fit into 120 2 times, resulting in a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 7374.36842
If we take 114 away from 120, 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.

Going ahead to step 12:
60 divided by 57 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 7374.368421
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.

Going ahead to step 13:
The number 57 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 7374.368421
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 14:
If we divide 300 by 57, we get 5 and a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 7374.36842105
Subtracting 285 from 300 leaves us with 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 7374.36842105 and a remainder of 1.5e-08.