We look at the division of 83635721 by 520 
We want to figure out the number of times 83635721 can be divided by 520.

Step 1:
520 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 520

Let's proceed to step 2:
520 can be fit into 83 0 times, resulting in a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 83 to get 83.
Bring next digit (6) of the dividend behind the 83 and repeat the process: 836 / 520

On to step 3:
520 can be fit into 836 1 times, resulting in a remainder of 316.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 520 from 836 leaves us with 316.
Fetch the next digit (3) from the dividend, attach it to 316 and continue: 3163 / 520

Advancing to step 4:
520 goes into 3163 6 times with a remainder of 43.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 43 after subtracting 3120 from 3163.
Grab the next digit (5) from the dividend, add it to 43, then carry on: 435 / 520

Let's proceed to step 5:
435 divided by 520 is 0 with a remainder of 435.
The next digit of our result is 0. 
Result so far: 160.0
If we take 0 away from 435, we end up with 435.
Append the next digit (7) from the dividend to 435 and continue with: 4357 / 520

Advancing to step 6:
4357 divided by 520 is 8 with a remainder of 197.
The next digit of our result is 8. 
Result so far: 1608.0
Subtract 4160 from 4357 to get 197.
Grab the next digit (2) from the dividend, add it to 197, then carry on: 1972 / 520

Advancing to step 7:
If we divide 1972 by 520, we get 3 and a remainder of 412.
The number 3 becomes the next digit in our result. 
Result so far: 16083.0
Subtract 1560 from 1972 to get 412.
Fetch the next digit (1) from the dividend, attach it to 412 and continue: 4121 / 520

Going ahead to step 8:
4121 divided by 520 is 7 with a remainder of 481.
Put 7 as the next digit of the answer. 
Result so far: 160837.0
If we take 3640 away from 4121, we end up with 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

On to step 9:
4810 divided by 520 is 9 with a remainder of 130.
Record the quotient 9 as the next digit in the result. 
Result so far: 160837.9
Deduct 4680 from 4810 and we're left with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

On to step 10:
520 can be fit into 1300 2 times, resulting in a remainder of 260.
Use 2 as the next digit of our solution. 
Result so far: 160837.92
Subtract 1040 from 1300 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 11:
2600 divided by 520 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 160837.925
The remainder is 0 after subtracting 2600 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
520 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 160837.925
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 13:
When dividing 0 by 520, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 160837.925
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 160837.925, and the remainder is 0.0.