We're dividing 97851907 by 815 
We want to figure out the number of times 97851907 can be divided by 815.

Moving on to step 1:
The number 815 fits into 9 0 times, leaving a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (7) from the dividend after 9, then repeat: 97 / 815

Advancing to step 2:
The number 815 fits into 97 0 times, leaving a remainder of 97.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 97 after subtracting 0 from 97.
Bring next digit (8) of the dividend behind the 97 and repeat the process: 978 / 815

Going ahead to step 3:
815 can be fit into 978 1 times, resulting in a remainder of 163.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 815 from 978, we get 163.
Append the next digit (5) from the dividend to 163 and continue with: 1635 / 815

Moving on to step 4:
1635 divided by 815 is 2 with a remainder of 5.
The next digit of our result is 2. 
Result so far: 12.0
If we take 1630 away from 1635, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 815

Going ahead to step 5:
815 can be fit into 51 0 times, resulting in a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 120.0
Deduct 0 from 51 and we're left with 51.
Take the next digit (9) from the dividend and append it to 51, then repeat: 519 / 815

Step 6:
815 can be fit into 519 0 times, resulting in a remainder of 519.
The next digit of our result is 0. 
Result so far: 1200.0
Deduct 0 from 519 and we're left with 519.
Append the next digit (0) from the dividend to 519 and continue with: 5190 / 815

Let's proceed to step 7:
If we divide 5190 by 815, we get 6 and a remainder of 300.
Write down 6 as next digit of the result. 
Result so far: 12006.0
Subtract 4890 from 5190 to get 300.
Include the next digit (7) from the dividend after 300, then repeat: 3007 / 815

Step 8:
If we divide 3007 by 815, we get 3 and a remainder of 562.
The number 3 becomes the next digit in our result. 
Result so far: 120063.0
The remainder is 562 after subtracting 2445 from 3007.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5620, and continue the process.

Going ahead to step 9:
The number 815 fits into 5620 6 times, leaving a remainder of 730.
The number 6 becomes the next digit in our result. 
Result so far: 120063.6
The remainder is 730 after subtracting 4890 from 5620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7300, and continue the process.

Let's proceed to step 10:
815 can be fit into 7300 8 times, resulting in a remainder of 780.
Use 8 as the next digit of our solution. 
Result so far: 120063.68
The remainder is 780 after subtracting 6520 from 7300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7800, and continue the process.

Moving on to step 11:
815 can be fit into 7800 9 times, resulting in a remainder of 465.
The number 9 becomes the next digit in our result. 
Result so far: 120063.689
If we subtract 7335 from 7800, we get 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Advancing to step 12:
When dividing 4650 by 815, we get 5 with a remainder of 575.
Use 5 as the next digit of our solution. 
Result so far: 120063.6895
The remainder is 575 after subtracting 4075 from 4650.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Let's proceed to step 13:
When dividing 5750 by 815, we get 7 with a remainder of 45.
Use 7 as the next digit of our solution. 
Result so far: 120063.68957
Deduct 5705 from 5750 and we're left with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

On to step 14:
If we divide 450 by 815, we get 0 and a remainder of 450.
The number 0 becomes the next digit in our result. 
Result so far: 120063.68957
If we subtract 0 from 450, we get 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Advancing to step 15:
The number 815 fits into 4500 5 times, leaving a remainder of 425.
The next digit of our result is 5. 
Result so far: 120063.6895705
If we subtract 4075 from 4500, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Moving on to step 16:
4250 divided by 815 is 5 with a remainder of 175.
The number 5 becomes the next digit in our result. 
Result so far: 120063.68957055
Deduct 4075 from 4250 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

In conclusion, the division gives 120063.68957055 with a balance of 1.75e-07.