83640429 divided by 31 
We want to figure out the number of times 83640429 can be divided by 31.

Step 1:
31 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Bring next digit (3) of the dividend behind the 8 and repeat the process: 83 / 31

Let's proceed to step 2:
When dividing 83 by 31, we get 2 with a remainder of 21.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 21 after subtracting 62 from 83.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 31

Step 3:
31 goes into 216 6 times with a remainder of 30.
Write down 6 as next digit of the result. 
Result so far: 26.0
The remainder is 30 after subtracting 186 from 216.
Grab the next digit (4) from the dividend, add it to 30, then carry on: 304 / 31

Step 4:
31 can be fit into 304 9 times, resulting in a remainder of 25.
The number 9 becomes the next digit in our result. 
Result so far: 269.0
The remainder is 25 after subtracting 279 from 304.
Grab the next digit (0) from the dividend, add it to 25, then carry on: 250 / 31

Going ahead to step 5:
The number 31 fits into 250 8 times, leaving a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 2698.0
Deduct 248 from 250 and we're left with 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 31

Step 6:
24 divided by 31 is 0 with a remainder of 24.
The next digit of our result is 0. 
Result so far: 26980.0
If we take 0 away from 24, we end up with 24.
Append the next digit (2) from the dividend to 24 and continue with: 242 / 31

On to step 7:
When dividing 242 by 31, we get 7 with a remainder of 25.
Use 7 as the next digit of our solution. 
Result so far: 269807.0
The remainder is 25 after subtracting 217 from 242.
Bring next digit (9) of the dividend behind the 25 and repeat the process: 259 / 31

Going ahead to step 8:
259 divided by 31 is 8 with a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 2698078.0
The remainder is 11 after subtracting 248 from 259.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 9:
31 goes into 110 3 times with a remainder of 17.
The next digit of our result is 3. 
Result so far: 2698078.3
If we subtract 93 from 110, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 10:
31 can be fit into 170 5 times, resulting in a remainder of 15.
The next digit of our result is 5. 
Result so far: 2698078.35
Subtract 155 from 170 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 11:
When dividing 150 by 31, we get 4 with a remainder of 26.
Use 4 as the next digit of our solution. 
Result so far: 2698078.354
Subtract 124 from 150 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 12:
When dividing 260 by 31, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 2698078.3548
Subtract 248 from 260 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 13:
If we divide 120 by 31, we get 3 and a remainder of 27.
Write down 3 as next digit of the result. 
Result so far: 2698078.35483
Deduct 93 from 120 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

On to step 14:
When dividing 270 by 31, we get 8 with a remainder of 22.
The number 8 becomes the next digit in our result. 
Result so far: 2698078.354838
Deduct 248 from 270 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 15:
If we divide 220 by 31, we get 7 and a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 2698078.3548387
Deduct 217 from 220 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.

Going ahead to step 16:
The number 31 fits into 30 0 times, leaving a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 2698078.3548387
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 2698078.3548387 with a remaining 3e-08.