30813878 ÷ 31 
We want to divide 30813878 by 31.

Going ahead to step 1:
The number 31 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 31

Let's proceed to step 2:
If we divide 30 by 31, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Include the next digit (8) from the dividend after 30, then repeat: 308 / 31

Step 3:
31 can be fit into 308 9 times, resulting in a remainder of 29.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 279 from 308 leaves us with 29.
Grab the next digit (1) from the dividend, add it to 29, then carry on: 291 / 31

Going ahead to step 4:
291 divided by 31 is 9 with a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Subtracting 279 from 291 leaves us with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 31

Let's proceed to step 5:
The number 31 fits into 123 3 times, leaving a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 993.0
If we take 93 away from 123, we end up with 30.
Append the next digit (8) from the dividend to 30 and continue with: 308 / 31

Going ahead to step 6:
308 divided by 31 is 9 with a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 9939.0
Subtracting 279 from 308 leaves us with 29.
Take the next digit (7) from the dividend and append it to 29, then repeat: 297 / 31

Moving on to step 7:
When dividing 297 by 31, we get 9 with a remainder of 18.
The next digit of our result is 9. 
Result so far: 99399.0
The remainder is 18 after subtracting 279 from 297.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 31

Moving on to step 8:
31 can be fit into 188 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 993996.0
Deduct 186 from 188 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
31 goes into 20 0 times with a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 993996.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
If we divide 200 by 31, we get 6 and a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 993996.06
Subtracting 186 from 200 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 11:
When dividing 140 by 31, we get 4 with a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 993996.064
If we subtract 124 from 140, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 12:
31 goes into 160 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 993996.0645
Subtracting 155 from 160 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 13:
When dividing 50 by 31, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 993996.06451
If we subtract 31 from 50, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 14:
31 goes into 190 6 times with a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 993996.064516
Deduct 186 from 190 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 15:
40 divided by 31 is 1 with a remainder of 9.
The next digit of our result is 1. 
Result so far: 993996.0645161
The remainder is 9 after subtracting 31 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 16:
The number 31 fits into 90 2 times, leaving a remainder of 28.
The number 2 becomes the next digit in our result. 
Result so far: 993996.06451612
Subtracting 62 from 90 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.

In conclusion, the division gives 993996.06451612 with a balance of 2.8e-08.