We look at the division of 83003603 by 53 
We want to figure out the number of times 83003603 can be divided by 53.

On to step 1:
The number 53 fits into 8 0 times, leaving a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 53

Advancing to step 2:
53 can be fit into 83 1 times, resulting in a remainder of 30.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 53 from 83, we get 30.
Include the next digit (0) from the dividend after 30, then repeat: 300 / 53

Advancing to step 3:
The number 53 fits into 300 5 times, leaving a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 15.0
Subtracting 265 from 300 leaves us with 35.
Grab the next digit (0) from the dividend, add it to 35, then carry on: 350 / 53

Moving on to step 4:
When dividing 350 by 53, we get 6 with a remainder of 32.
The next digit of our result is 6. 
Result so far: 156.0
Subtract 318 from 350 to get 32.
Grab the next digit (3) from the dividend, add it to 32, then carry on: 323 / 53

Step 5:
53 goes into 323 6 times with a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 1566.0
The remainder is 5 after subtracting 318 from 323.
Include the next digit (6) from the dividend after 5, then repeat: 56 / 53

Let's proceed to step 6:
When dividing 56 by 53, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 15661.0
Subtracting 53 from 56 leaves us with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 53

Let's proceed to step 7:
When dividing 30 by 53, we get 0 with a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 156610.0
The remainder is 30 after subtracting 0 from 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 53

Step 8:
The number 53 fits into 303 5 times, leaving a remainder of 38.
Write down 5 as next digit of the result. 
Result so far: 1566105.0
Subtract 265 from 303 to get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 9:
When dividing 380 by 53, we get 7 with a remainder of 9.
Record the quotient 7 as the next digit in the result. 
Result so far: 1566105.7
Deduct 371 from 380 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 10:
90 divided by 53 is 1 with a remainder of 37.
The next digit of our result is 1. 
Result so far: 1566105.71
If we subtract 53 from 90, we get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Going ahead to step 11:
53 goes into 370 6 times with a remainder of 52.
The next digit of our result is 6. 
Result so far: 1566105.716
Subtract 318 from 370 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 12:
If we divide 520 by 53, we get 9 and a remainder of 43.
Use 9 as the next digit of our solution. 
Result so far: 1566105.7169
The remainder is 43 after subtracting 477 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

On to step 13:
When dividing 430 by 53, we get 8 with a remainder of 6.
The next digit of our result is 8. 
Result so far: 1566105.71698
The remainder is 6 after subtracting 424 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 14:
When dividing 60 by 53, we get 1 with a remainder of 7.
Put 1 as the next digit of the answer. 
Result so far: 1566105.716981
If we subtract 53 from 60, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 15:
53 can be fit into 70 1 times, resulting in a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 1566105.7169811
Deduct 53 from 70 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 1566105.7169811, with a leftover of 1.7e-07.