81930109 divided by 631 
We're looking to find how many times 631 goes into 81930109.

Advancing to step 1:
When dividing 8 by 631, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 631

Advancing to step 2:
631 goes into 81 0 times with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Take the next digit (9) from the dividend and append it to 81, then repeat: 819 / 631

On to step 3:
The number 631 fits into 819 1 times, leaving a remainder of 188.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 631 from 819 leaves us with 188.
Grab the next digit (3) from the dividend, add it to 188, then carry on: 1883 / 631

Going ahead to step 4:
1883 divided by 631 is 2 with a remainder of 621.
The next digit of our result is 2. 
Result so far: 12.0
Deduct 1262 from 1883 and we're left with 621.
Append the next digit (0) from the dividend to 621 and continue with: 6210 / 631

Let's proceed to step 5:
The number 631 fits into 6210 9 times, leaving a remainder of 531.
The next digit of our result is 9. 
Result so far: 129.0
Subtracting 5679 from 6210 leaves us with 531.
Bring next digit (1) of the dividend behind the 531 and repeat the process: 5311 / 631

Let's proceed to step 6:
The number 631 fits into 5311 8 times, leaving a remainder of 263.
Write down 8 as next digit of the result. 
Result so far: 1298.0
Deduct 5048 from 5311 and we're left with 263.
Take the next digit (0) from the dividend and append it to 263, then repeat: 2630 / 631

Advancing to step 7:
631 goes into 2630 4 times with a remainder of 106.
The next digit of our result is 4. 
Result so far: 12984.0
If we take 2524 away from 2630, we end up with 106.
Fetch the next digit (9) from the dividend, attach it to 106 and continue: 1069 / 631

Advancing to step 8:
When dividing 1069 by 631, we get 1 with a remainder of 438.
Use 1 as the next digit of our solution. 
Result so far: 129841.0
If we subtract 631 from 1069, we get 438.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4380, and continue the process.

Going ahead to step 9:
If we divide 4380 by 631, we get 6 and a remainder of 594.
The next digit of our result is 6. 
Result so far: 129841.6
Subtract 3786 from 4380 to get 594.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5940, and continue the process.

Going ahead to step 10:
If we divide 5940 by 631, we get 9 and a remainder of 261.
Use 9 as the next digit of our solution. 
Result so far: 129841.69
If we subtract 5679 from 5940, we get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

On to step 11:
631 can be fit into 2610 4 times, resulting in a remainder of 86.
Use 4 as the next digit of our solution. 
Result so far: 129841.694
If we take 2524 away from 2610, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 12:
The number 631 fits into 860 1 times, leaving a remainder of 229.
Put 1 as the next digit of the answer. 
Result so far: 129841.6941
Subtract 631 from 860 to get 229.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2290, and continue the process.

On to step 13:
If we divide 2290 by 631, we get 3 and a remainder of 397.
Put 3 as the next digit of the answer. 
Result so far: 129841.69413
If we take 1893 away from 2290, we end up with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Advancing to step 14:
631 goes into 3970 6 times with a remainder of 184.
The number 6 becomes the next digit in our result. 
Result so far: 129841.694136
Subtract 3786 from 3970 to get 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Let's proceed to step 15:
The number 631 fits into 1840 2 times, leaving a remainder of 578.
The number 2 becomes the next digit in our result. 
Result so far: 129841.6941362
If we subtract 1262 from 1840, we get 578.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5780, and continue the process.

Advancing to step 16:
631 goes into 5780 9 times with a remainder of 101.
The next digit of our result is 9. 
Result so far: 129841.69413629
Deduct 5679 from 5780 and we're left with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

The final result is 129841.69413629 with a remainder of 1.01e-07.