We're dividing 3960 by 57 
Let's see how many times 57 fits into 3960.

Step 1:
If we divide 3 by 57, we get 0 and a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 57

Advancing to step 2:
57 can be fit into 39 0 times, resulting in a remainder of 39.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Include the next digit (6) from the dividend after 39, then repeat: 396 / 57

Going ahead to step 3:
57 goes into 396 6 times with a remainder of 54.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we take 342 away from 396, we end up with 54.
Grab the next digit (0) from the dividend, add it to 54, then carry on: 540 / 57

Going ahead to step 4:
540 divided by 57 is 9 with a remainder of 27.
Write down 9 as next digit of the result. 
Result so far: 69.0
Deduct 513 from 540 and we're left 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.

Moving on to step 5:
The number 57 fits into 270 4 times, leaving a remainder of 42.
Put 4 as the next digit of the answer. 
Result so far: 69.4
If we subtract 228 from 270, we get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Moving on to step 6:
If we divide 420 by 57, we get 7 and a remainder of 21.
Write down 7 as next digit of the result. 
Result so far: 69.47
Deduct 399 from 420 and we're left 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.

Step 7:
210 divided by 57 is 3 with a remainder of 39.
Record the quotient 3 as the next digit in the result. 
Result so far: 69.473
If we subtract 171 from 210, we 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.

Let's proceed to step 8:
57 goes into 390 6 times with a remainder of 48.
Put 6 as the next digit of the answer. 
Result so far: 69.4736
Deduct 342 from 390 and we're left 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.

Let's proceed to step 9:
The number 57 fits into 480 8 times, leaving a remainder of 24.
The number 8 becomes the next digit in our result. 
Result so far: 69.47368
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.

Moving on to step 10:
The number 57 fits into 240 4 times, leaving a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 69.473684
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.

Going ahead to step 11:
The number 57 fits into 120 2 times, leaving a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 69.4736842
Subtract 114 from 120 to get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 12:
When dividing 60 by 57, we get 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 69.47368421
Deduct 57 from 60 and we're left 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 quotient of the division is 69.47368421, and the remainder is 3e-09.