91512140 ÷ 315 
Our goal is to divide 91512140 by 315.

Step 1:
If we divide 9 by 315, we get 0 and a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 315

Moving on to step 2:
When dividing 91 by 315, we get 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (5) from the dividend after 91, then repeat: 915 / 315

On to step 3:
915 divided by 315 is 2 with a remainder of 285.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 630 from 915 leaves us with 285.
Append the next digit (1) from the dividend to 285 and continue with: 2851 / 315

Let's proceed to step 4:
When dividing 2851 by 315, we get 9 with a remainder of 16.
Put 9 as the next digit of the answer. 
Result so far: 29.0
The remainder is 16 after subtracting 2835 from 2851.
Fetch the next digit (2) from the dividend, attach it to 16 and continue: 162 / 315

Advancing to step 5:
315 goes into 162 0 times with a remainder of 162.
Put 0 as the next digit of the answer. 
Result so far: 290.0
Deduct 0 from 162 and we're left with 162.
Append the next digit (1) from the dividend to 162 and continue with: 1621 / 315

Step 6:
315 goes into 1621 5 times with a remainder of 46.
Put 5 as the next digit of the answer. 
Result so far: 2905.0
Deduct 1575 from 1621 and we're left with 46.
Include the next digit (4) from the dividend after 46, then repeat: 464 / 315

Moving on to step 7:
When dividing 464 by 315, we get 1 with a remainder of 149.
Write down 1 as next digit of the result. 
Result so far: 29051.0
Subtracting 315 from 464 leaves us with 149.
Take the next digit (0) from the dividend and append it to 149, then repeat: 1490 / 315

Step 8:
1490 divided by 315 is 4 with a remainder of 230.
Use 4 as the next digit of our solution. 
Result so far: 290514.0
Deduct 1260 from 1490 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 9:
2300 divided by 315 is 7 with a remainder of 95.
Use 7 as the next digit of our solution. 
Result so far: 290514.7
Subtract 2205 from 2300 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 10:
950 divided by 315 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 290514.73
Subtracting 945 from 950 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.

Moving on to step 11:
50 divided by 315 is 0 with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 290514.73
The remainder is 50 after subtracting 0 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 12:
500 divided by 315 is 1 with a remainder of 185.
The next digit of our result is 1. 
Result so far: 290514.7301
Deduct 315 from 500 and we're left with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Moving on to step 13:
The number 315 fits into 1850 5 times, leaving a remainder of 275.
Use 5 as the next digit of our solution. 
Result so far: 290514.73015
If we subtract 1575 from 1850, we get 275.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2750, and continue the process.

Advancing to step 14:
315 can be fit into 2750 8 times, resulting in a remainder of 230.
Use 8 as the next digit of our solution. 
Result so far: 290514.730158
Subtract 2520 from 2750 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Moving on to step 15:
315 can be fit into 2300 7 times, resulting in a remainder of 95.
The number 7 becomes the next digit in our result. 
Result so far: 290514.7301587
If we take 2205 away from 2300, we end up with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

On to step 16:
If we divide 950 by 315, we get 3 and a remainder of 5.
The next digit of our result is 3. 
Result so far: 290514.73015873
Subtract 945 from 950 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 290514.73015873 with a remainder of 5e-09.