3851280 ÷ 849 
Our goal is to divide 3851280 by 849.

Advancing to step 1:
849 can be fit into 3 0 times, resulting in a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (8) from the dividend after 3, then repeat: 38 / 849

Advancing to step 2:
If we divide 38 by 849, we get 0 and a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 38 leaves us with 38.
Append the next digit (5) from the dividend to 38 and continue with: 385 / 849

Advancing to step 3:
If we divide 385 by 849, we get 0 and a remainder of 385.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 385 to get 385.
Include the next digit (1) from the dividend after 385, then repeat: 3851 / 849

Step 4:
If we divide 3851 by 849, we get 4 and a remainder of 455.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 3396 from 3851, we get 455.
Bring next digit (2) of the dividend behind the 455 and repeat the process: 4552 / 849

Moving on to step 5:
849 can be fit into 4552 5 times, resulting in a remainder of 307.
Write down 5 as next digit of the result. 
Result so far: 45.0
The remainder is 307 after subtracting 4245 from 4552.
Take the next digit (8) from the dividend and append it to 307, then repeat: 3078 / 849

Let's proceed to step 6:
3078 divided by 849 is 3 with a remainder of 531.
The next digit of our result is 3. 
Result so far: 453.0
The remainder is 531 after subtracting 2547 from 3078.
Include the next digit (0) from the dividend after 531, then repeat: 5310 / 849

Let's proceed to step 7:
849 can be fit into 5310 6 times, resulting in a remainder of 216.
The next digit of our result is 6. 
Result so far: 4536.0
Subtract 5094 from 5310 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

Let's proceed to step 8:
849 can be fit into 2160 2 times, resulting in a remainder of 462.
The next digit of our result is 2. 
Result so far: 4536.2
If we take 1698 away from 2160, we end up with 462.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4620, and continue the process.

Step 9:
849 can be fit into 4620 5 times, resulting in a remainder of 375.
Use 5 as the next digit of our solution. 
Result so far: 4536.25
Subtract 4245 from 4620 to get 375.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3750, and continue the process.

Going ahead to step 10:
If we divide 3750 by 849, we get 4 and a remainder of 354.
The next digit of our result is 4. 
Result so far: 4536.254
If we take 3396 away from 3750, we end up with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Going ahead to step 11:
When dividing 3540 by 849, we get 4 with a remainder of 144.
Write down 4 as next digit of the result. 
Result so far: 4536.2544
Subtract 3396 from 3540 to get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

The final outcome is 4536.2544, with a leftover of 0.00144.