383851 ÷ 77 
We want to figure out the number of times 383851 can be divided by 77.

Step 1:
If we divide 3 by 77, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 77

On to step 2:
If we divide 38 by 77, we get 0 and a remainder of 38.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 38 and we're left with 38.
Fetch the next digit (3) from the dividend, attach it to 38 and continue: 383 / 77

Advancing to step 3:
383 divided by 77 is 4 with a remainder of 75.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 75 after subtracting 308 from 383.
Append the next digit (8) from the dividend to 75 and continue with: 758 / 77

Going ahead to step 4:
77 can be fit into 758 9 times, resulting in a remainder of 65.
Write down 9 as next digit of the result. 
Result so far: 49.0
Deduct 693 from 758 and we're left with 65.
Grab the next digit (5) from the dividend, add it to 65, then carry on: 655 / 77

Moving on to step 5:
When dividing 655 by 77, we get 8 with a remainder of 39.
Write down 8 as next digit of the result. 
Result so far: 498.0
Subtracting 616 from 655 leaves us with 39.
Bring next digit (1) of the dividend behind the 39 and repeat the process: 391 / 77

Step 6:
If we divide 391 by 77, we get 5 and a remainder of 6.
The number 5 becomes the next digit in our result. 
Result so far: 4985.0
Subtract 385 from 391 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.

On to step 7:
If we divide 60 by 77, we get 0 and a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 4985.0
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 8:
When dividing 600 by 77, we get 7 with a remainder of 61.
The number 7 becomes the next digit in our result. 
Result so far: 4985.07
If we take 539 away from 600, we end up with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 9:
610 divided by 77 is 7 with a remainder of 71.
The number 7 becomes the next digit in our result. 
Result so far: 4985.077
If we subtract 539 from 610, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

After the division, we end up with 4985.077 and a remainder of 0.0071.