We look at the division of 2539936 by 646 
We want to figure out the number of times 2539936 can be divided by 646.

Moving on to step 1:
646 can be fit into 2 0 times, resulting in a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (5) from the dividend and append it to 2, then repeat: 25 / 646

On to step 2:
646 can be fit into 25 0 times, resulting in a remainder of 25.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Grab the next digit (3) from the dividend, add it to 25, then carry on: 253 / 646

Let's proceed to step 3:
If we divide 253 by 646, we get 0 and a remainder of 253.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 253 to get 253.
Take the next digit (9) from the dividend and append it to 253, then repeat: 2539 / 646

On to step 4:
2539 divided by 646 is 3 with a remainder of 601.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 1938 from 2539, we get 601.
Fetch the next digit (9) from the dividend, attach it to 601 and continue: 6019 / 646

On to step 5:
If we divide 6019 by 646, we get 9 and a remainder of 205.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
If we subtract 5814 from 6019, we get 205.
Grab the next digit (3) from the dividend, add it to 205, then carry on: 2053 / 646

Going ahead to step 6:
646 can be fit into 2053 3 times, resulting in a remainder of 115.
The number 3 becomes the next digit in our result. 
Result so far: 393.0
The remainder is 115 after subtracting 1938 from 2053.
Take the next digit (6) from the dividend and append it to 115, then repeat: 1156 / 646

Step 7:
646 goes into 1156 1 times with a remainder of 510.
Write down 1 as next digit of the result. 
Result so far: 3931.0
If we take 646 away from 1156, we end up with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

Let's proceed to step 8:
646 goes into 5100 7 times with a remainder of 578.
Use 7 as the next digit of our solution. 
Result so far: 3931.7
If we take 4522 away from 5100, we end up with 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

On to step 9:
The number 646 fits into 5780 8 times, leaving a remainder of 612.
Put 8 as the next digit of the answer. 
Result so far: 3931.78
The remainder is 612 after subtracting 5168 from 5780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6120, and continue the process.

On to step 10:
The number 646 fits into 6120 9 times, leaving a remainder of 306.
Write down 9 as next digit of the result. 
Result so far: 3931.789
If we subtract 5814 from 6120, we get 306.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3060, and continue the process.

Let's proceed to step 11:
If we divide 3060 by 646, we get 4 and a remainder of 476.
The number 4 becomes the next digit in our result. 
Result so far: 3931.7894
Subtract 2584 from 3060 to get 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Advancing to step 12:
If we divide 4760 by 646, we get 7 and a remainder of 238.
The number 7 becomes the next digit in our result. 
Result so far: 3931.78947
Subtracting 4522 from 4760 leaves us with 238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2380, and continue the process.

Going ahead to step 13:
646 goes into 2380 3 times with a remainder of 442.
Use 3 as the next digit of our solution. 
Result so far: 3931.789473
Deduct 1938 from 2380 and we're left with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Let's proceed to step 14:
If we divide 4420 by 646, we get 6 and a remainder of 544.
Put 6 as the next digit of the answer. 
Result so far: 3931.7894736
Subtracting 3876 from 4420 leaves us with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Let's proceed to step 15:
5440 divided by 646 is 8 with a remainder of 272.
Record the quotient 8 as the next digit in the result. 
Result so far: 3931.78947368
The remainder is 272 after subtracting 5168 from 5440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

After the division, we end up with 3931.78947368 and a remainder of 2.72e-07.