31521415 ÷ 811 
We want to figure out the number of times 31521415 can be divided by 811.

Moving on to step 1:
3 divided by 811 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 811

Step 2:
811 can be fit into 31 0 times, resulting in a remainder of 31.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 31 to get 31.
Take the next digit (5) from the dividend and append it to 31, then repeat: 315 / 811

Let's proceed to step 3:
315 divided by 811 is 0 with a remainder of 315.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 315 leaves us with 315.
Fetch the next digit (2) from the dividend, attach it to 315 and continue: 3152 / 811

Advancing to step 4:
3152 divided by 811 is 3 with a remainder of 719.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 2433 from 3152 to get 719.
Take the next digit (1) from the dividend and append it to 719, then repeat: 7191 / 811

On to step 5:
7191 divided by 811 is 8 with a remainder of 703.
The next digit of our result is 8. 
Result so far: 38.0
Deduct 6488 from 7191 and we're left with 703.
Append the next digit (4) from the dividend to 703 and continue with: 7034 / 811

On to step 6:
811 goes into 7034 8 times with a remainder of 546.
The number 8 becomes the next digit in our result. 
Result so far: 388.0
If we subtract 6488 from 7034, we get 546.
Bring next digit (1) of the dividend behind the 546 and repeat the process: 5461 / 811

Advancing to step 7:
5461 divided by 811 is 6 with a remainder of 595.
The number 6 becomes the next digit in our result. 
Result so far: 3886.0
Subtract 4866 from 5461 to get 595.
Bring next digit (5) of the dividend behind the 595 and repeat the process: 5955 / 811

Let's proceed to step 8:
If we divide 5955 by 811, we get 7 and a remainder of 278.
The number 7 becomes the next digit in our result. 
Result so far: 38867.0
If we subtract 5677 from 5955, we get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Step 9:
811 goes into 2780 3 times with a remainder of 347.
The number 3 becomes the next digit in our result. 
Result so far: 38867.3
If we take 2433 away from 2780, we end up with 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

On to step 10:
811 can be fit into 3470 4 times, resulting in a remainder of 226.
Use 4 as the next digit of our solution. 
Result so far: 38867.34
Subtracting 3244 from 3470 leaves us with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Let's proceed to step 11:
The number 811 fits into 2260 2 times, leaving a remainder of 638.
Put 2 as the next digit of the answer. 
Result so far: 38867.342
Deduct 1622 from 2260 and we're left with 638.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

On to step 12:
811 can be fit into 6380 7 times, resulting in a remainder of 703.
Put 7 as the next digit of the answer. 
Result so far: 38867.3427
If we subtract 5677 from 6380, we get 703.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7030, and continue the process.

Going ahead to step 13:
If we divide 7030 by 811, we get 8 and a remainder of 542.
Put 8 as the next digit of the answer. 
Result so far: 38867.34278
Deduct 6488 from 7030 and we're left with 542.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5420, and continue the process.

Going ahead to step 14:
If we divide 5420 by 811, we get 6 and a remainder of 554.
Record the quotient 6 as the next digit in the result. 
Result so far: 38867.342786
If we take 4866 away from 5420, we end up with 554.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5540, and continue the process.

On to step 15:
When dividing 5540 by 811, we get 6 with a remainder of 674.
The next digit of our result is 6. 
Result so far: 38867.3427866
If we subtract 4866 from 5540, we get 674.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6740, and continue the process.

After the division, we end up with 38867.3427866 and a remainder of 6.74e-06.