We're dividing 315939 by 77 
We want to figure out the number of times 315939 can be divided by 77.

Advancing to step 1:
If we divide 3 by 77, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 77

Advancing to step 2:
The number 77 fits into 31 0 times, leaving a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Fetch the next digit (5) from the dividend, attach it to 31 and continue: 315 / 77

Let's proceed to step 3:
The number 77 fits into 315 4 times, leaving a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 308 from 315 leaves us with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 77

Step 4:
79 divided by 77 is 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 41.0
The remainder is 2 after subtracting 77 from 79.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 77

On to step 5:
77 can be fit into 23 0 times, resulting in a remainder of 23.
Use 0 as the next digit of our solution. 
Result so far: 410.0
Subtract 0 from 23 to get 23.
Grab the next digit (9) from the dividend, add it to 23, then carry on: 239 / 77

Step 6:
239 divided by 77 is 3 with a remainder of 8.
Use 3 as the next digit of our solution. 
Result so far: 4103.0
The remainder is 8 after subtracting 231 from 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
77 goes into 80 1 times with a remainder of 3.
Write down 1 as next digit of the result. 
Result so far: 4103.1
Subtracting 77 from 80 leaves us 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.

On to step 8:
77 can be fit into 30 0 times, resulting in a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 4103.1
The remainder is 30 after subtracting 0 from 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 9:
The number 77 fits into 300 3 times, leaving a remainder of 69.
Use 3 as the next digit of our solution. 
Result so far: 4103.103
The remainder is 69 after subtracting 231 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

Advancing to step 10:
If we divide 690 by 77, we get 8 and a remainder of 74.
The number 8 becomes the next digit in our result. 
Result so far: 4103.1038
Subtracting 616 from 690 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 11:
77 can be fit into 740 9 times, resulting in a remainder of 47.
Record the quotient 9 as the next digit in the result. 
Result so far: 4103.10389
Deduct 693 from 740 and we're left with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Step 12:
The number 77 fits into 470 6 times, leaving a remainder of 8.
The next digit of our result is 6. 
Result so far: 4103.103896
The remainder is 8 after subtracting 462 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 13:
80 divided by 77 is 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 4103.1038961
Deduct 77 from 80 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.

Step 14:
77 can be fit into 30 0 times, resulting in a remainder of 30.
The next digit of our result is 0. 
Result so far: 4103.1038961
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Our division results in 4103.1038961 with a remaining 3e-08.