We divide 312931 by 78
Our goal is to divide 312931 by 78.

Advancing to step 1:
If we divide 3 by 78, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 78

Advancing to step 2:
The number 78 fits into 31 0 times, leaving a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Include the next digit (2) from the dividend after 31, then repeat: 312 / 78

Going ahead to step 3:
312 divided by 78 is 4 with a remainder of 0.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 312 from 312 leaves us with 0.
Bring next digit (9) of the dividend behind the 0 and repeat the process: 9 / 78

Moving on to step 4:
78 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
If we subtract 0 from 9, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 78

On to step 5:
93 divided by 78 is 1 with a remainder of 15.
Write down 1 as next digit of the result. 
Result so far: 401.0
Deduct 78 from 93 and we're left with 15.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 78

Let's proceed to step 6:
78 can be fit into 151 1 times, resulting in a remainder of 73.
Record the quotient 1 as the next digit in the result. 
Result so far: 4011.0
Subtract 78 from 151 to get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 7:
730 divided by 78 is 9 with a remainder of 28.
Write down 9 as next digit of the result. 
Result so far: 4011.9
Subtracting 702 from 730 leaves us with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

On to step 8:
280 divided by 78 is 3 with a remainder of 46.
Use 3 as the next digit of our solution. 
Result so far: 4011.93
Deduct 234 from 280 and we're left with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Moving on to step 9:
The number 78 fits into 460 5 times, leaving a remainder of 70.
Put 5 as the next digit of the answer. 
Result so far: 4011.935
If we subtract 390 from 460, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 10:
700 divided by 78 is 8 with a remainder of 76.
Use 8 as the next digit of our solution. 
Result so far: 4011.9358
Subtract 624 from 700 to get 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 11:
78 can be fit into 760 9 times, resulting in a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 4011.93589
If we take 702 away from 760, we end up with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 12:
The number 78 fits into 580 7 times, leaving a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 4011.935897
If we take 546 away from 580, we end up with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 13:
78 can be fit into 340 4 times, resulting in a remainder of 28.
Put 4 as the next digit of the answer. 
Result so far: 4011.9358974
If we subtract 312 from 340, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 14:
280 divided by 78 is 3 with a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 4011.93589743
If we take 234 away from 280, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Our division results in 4011.93589743 with a remaining 4.6e-08.