We're dividing 83203487 by 521 
Our goal is to divide 83203487 by 521.

On to step 1:
521 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 521

Step 2:
521 can be fit into 83 0 times, resulting in a remainder of 83.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 83 leaves us with 83.
Include the next digit (2) from the dividend after 83, then repeat: 832 / 521

On to step 3:
521 can be fit into 832 1 times, resulting in a remainder of 311.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 521 from 832 to get 311.
Append the next digit (0) from the dividend to 311 and continue with: 3110 / 521

Advancing to step 4:
3110 divided by 521 is 5 with a remainder of 505.
Use 5 as the next digit of our solution. 
Result so far: 15.0
The remainder is 505 after subtracting 2605 from 3110.
Grab the next digit (3) from the dividend, add it to 505, then carry on: 5053 / 521

Let's proceed to step 5:
If we divide 5053 by 521, we get 9 and a remainder of 364.
Write down 9 as next digit of the result. 
Result so far: 159.0
Subtracting 4689 from 5053 leaves us with 364.
Bring next digit (4) of the dividend behind the 364 and repeat the process: 3644 / 521

Moving on to step 6:
521 goes into 3644 6 times with a remainder of 518.
The next digit of our result is 6. 
Result so far: 1596.0
Subtract 3126 from 3644 to get 518.
Bring next digit (8) of the dividend behind the 518 and repeat the process: 5188 / 521

Step 7:
If we divide 5188 by 521, we get 9 and a remainder of 499.
The next digit of our result is 9. 
Result so far: 15969.0
Subtracting 4689 from 5188 leaves us with 499.
Grab the next digit (7) from the dividend, add it to 499, then carry on: 4997 / 521

On to step 8:
When dividing 4997 by 521, we get 9 with a remainder of 308.
Use 9 as the next digit of our solution. 
Result so far: 159699.0
The remainder is 308 after subtracting 4689 from 4997.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Moving on to step 9:
When dividing 3080 by 521, we get 5 with a remainder of 475.
Put 5 as the next digit of the answer. 
Result so far: 159699.5
If we subtract 2605 from 3080, we get 475.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4750, and continue the process.

Advancing to step 10:
The number 521 fits into 4750 9 times, leaving a remainder of 61.
Record the quotient 9 as the next digit in the result. 
Result so far: 159699.59
Deduct 4689 from 4750 and we're left with 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Step 11:
The number 521 fits into 610 1 times, leaving a remainder of 89.
Write down 1 as next digit of the result. 
Result so far: 159699.591
Deduct 521 from 610 and we're left with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Let's proceed to step 12:
If we divide 890 by 521, we get 1 and a remainder of 369.
The number 1 becomes the next digit in our result. 
Result so far: 159699.5911
Deduct 521 from 890 and we're left with 369.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3690, and continue the process.

The final result is 159699.5911 with a remainder of 0.00369.