35509812 ÷ 815 
Let's see how many times 815 fits into 35509812.

Let's proceed to step 1:
The number 815 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 815

Advancing to step 2:
The number 815 fits into 35 0 times, leaving a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Grab the next digit (5) from the dividend, add it to 35, then carry on: 355 / 815

Advancing to step 3:
If we divide 355 by 815, we get 0 and a remainder of 355.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 355 to get 355.
Grab the next digit (0) from the dividend, add it to 355, then carry on: 3550 / 815

Moving on to step 4:
The number 815 fits into 3550 4 times, leaving a remainder of 290.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we take 3260 away from 3550, we end up with 290.
Grab the next digit (9) from the dividend, add it to 290, then carry on: 2909 / 815

Moving on to step 5:
If we divide 2909 by 815, we get 3 and a remainder of 464.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we take 2445 away from 2909, we end up with 464.
Append the next digit (8) from the dividend to 464 and continue with: 4648 / 815

Moving on to step 6:
815 can be fit into 4648 5 times, resulting in a remainder of 573.
The next digit of our result is 5. 
Result so far: 435.0
The remainder is 573 after subtracting 4075 from 4648.
Fetch the next digit (1) from the dividend, attach it to 573 and continue: 5731 / 815

Advancing to step 7:
815 goes into 5731 7 times with a remainder of 26.
Record the quotient 7 as the next digit in the result. 
Result so far: 4357.0
The remainder is 26 after subtracting 5705 from 5731.
Include the next digit (2) from the dividend after 26, then repeat: 262 / 815

Going ahead to step 8:
If we divide 262 by 815, we get 0 and a remainder of 262.
The number 0 becomes the next digit in our result. 
Result so far: 43570.0
Subtracting 0 from 262 leaves us with 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2620, and continue the process.

Let's proceed to step 9:
The number 815 fits into 2620 3 times, leaving a remainder of 175.
Use 3 as the next digit of our solution. 
Result so far: 43570.3
Subtract 2445 from 2620 to get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

On to step 10:
If we divide 1750 by 815, we get 2 and a remainder of 120.
Put 2 as the next digit of the answer. 
Result so far: 43570.32
If we subtract 1630 from 1750, we get 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 11:
1200 divided by 815 is 1 with a remainder of 385.
The next digit of our result is 1. 
Result so far: 43570.321
If we take 815 away from 1200, we end up with 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 12:
The number 815 fits into 3850 4 times, leaving a remainder of 590.
Write down 4 as next digit of the result. 
Result so far: 43570.3214
Subtract 3260 from 3850 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

On to step 13:
The number 815 fits into 5900 7 times, leaving a remainder of 195.
Write down 7 as next digit of the result. 
Result so far: 43570.32147
Deduct 5705 from 5900 and we're left with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 14:
1950 divided by 815 is 2 with a remainder of 320.
The next digit of our result is 2. 
Result so far: 43570.321472
Deduct 1630 from 1950 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 15:
When dividing 3200 by 815, we get 3 with a remainder of 755.
The number 3 becomes the next digit in our result. 
Result so far: 43570.3214723
If we subtract 2445 from 3200, we get 755.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7550, and continue the process.

Step 16:
7550 divided by 815 is 9 with a remainder of 215.
The number 9 becomes the next digit in our result. 
Result so far: 43570.32147239
Subtracting 7335 from 7550 leaves us with 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

After the division, we end up with 43570.32147239 and a remainder of 2.15e-07.