We're dividing 3549401 by 256 
We want to figure out the number of times 3549401 can be divided by 256.

Going ahead to step 1:
3 divided by 256 is 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 256

On to step 2:
The number 256 fits into 35 0 times, leaving a remainder of 35.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Take the next digit (4) from the dividend and append it to 35, then repeat: 354 / 256

On to step 3:
If we divide 354 by 256, we get 1 and a remainder of 98.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 98 after subtracting 256 from 354.
Grab the next digit (9) from the dividend, add it to 98, then carry on: 989 / 256

Step 4:
When dividing 989 by 256, we get 3 with a remainder of 221.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Deduct 768 from 989 and we're left with 221.
Bring next digit (4) of the dividend behind the 221 and repeat the process: 2214 / 256

Let's proceed to step 5:
If we divide 2214 by 256, we get 8 and a remainder of 166.
The number 8 becomes the next digit in our result. 
Result so far: 138.0
The remainder is 166 after subtracting 2048 from 2214.
Fetch the next digit (0) from the dividend, attach it to 166 and continue: 1660 / 256

On to step 6:
1660 divided by 256 is 6 with a remainder of 124.
The next digit of our result is 6. 
Result so far: 1386.0
Deduct 1536 from 1660 and we're left with 124.
Append the next digit (1) from the dividend to 124 and continue with: 1241 / 256

Advancing to step 7:
If we divide 1241 by 256, we get 4 and a remainder of 217.
Use 4 as the next digit of our solution. 
Result so far: 13864.0
Deduct 1024 from 1241 and we're left with 217.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Going ahead to step 8:
The number 256 fits into 2170 8 times, leaving a remainder of 122.
Write down 8 as next digit of the result. 
Result so far: 13864.8
Subtracting 2048 from 2170 leaves us with 122.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1220, and continue the process.

Advancing to step 9:
The number 256 fits into 1220 4 times, leaving a remainder of 196.
The number 4 becomes the next digit in our result. 
Result so far: 13864.84
Deduct 1024 from 1220 and we're left with 196.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1960, and continue the process.

Let's proceed to step 10:
256 goes into 1960 7 times with a remainder of 168.
Record the quotient 7 as the next digit in the result. 
Result so far: 13864.847
Deduct 1792 from 1960 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 11:
256 goes into 1680 6 times with a remainder of 144.
Put 6 as the next digit of the answer. 
Result so far: 13864.8476
Deduct 1536 from 1680 and we're left with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Advancing to step 12:
256 goes into 1440 5 times with a remainder of 160.
Record the quotient 5 as the next digit in the result. 
Result so far: 13864.84765
Deduct 1280 from 1440 and we're left with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 13:
1600 divided by 256 is 6 with a remainder of 64.
Use 6 as the next digit of our solution. 
Result so far: 13864.847656
The remainder is 64 after subtracting 1536 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 14:
If we divide 640 by 256, we get 2 and a remainder of 128.
Write down 2 as next digit of the result. 
Result so far: 13864.8476562
The remainder is 128 after subtracting 512 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Advancing to step 15:
256 goes into 1280 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 13864.84765625
If we take 1280 away from 1280, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 13864.84765625, and the remainder is 0.0.