We're dividing 53535303 by 15 
Let's see how many times 15 fits into 53535303.

Let's proceed to step 1:
The number 15 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 15

Advancing to step 2:
The number 15 fits into 53 3 times, leaving a remainder of 8.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 45 from 53 to get 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 15

Let's proceed to step 3:
If we divide 85 by 15, we get 5 and a remainder of 10.
Write down 5 as next digit of the result. 
Result so far: 35.0
If we subtract 75 from 85, we get 10.
Grab the next digit (3) from the dividend, add it to 10, then carry on: 103 / 15

Moving on to step 4:
The number 15 fits into 103 6 times, leaving a remainder of 13.
Use 6 as the next digit of our solution. 
Result so far: 356.0
If we take 90 away from 103, we end up with 13.
Take the next digit (5) from the dividend and append it to 13, then repeat: 135 / 15

Advancing to step 5:
15 goes into 135 9 times with a remainder of 0.
Write down 9 as next digit of the result. 
Result so far: 3569.0
If we take 135 away from 135, we end up with 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 15

On to step 6:
15 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 35690.0
Deduct 0 from 3 and we're left with 3.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 15

Moving on to step 7:
The number 15 fits into 30 2 times, leaving a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 356902.0
Subtract 30 from 30 to get 0.
Fetch the next digit (3) from the dividend, attach it to 0 and continue: 3 / 15

Going ahead to step 8:
The number 15 fits into 3 0 times, leaving a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 3569020.0
The remainder is 3 after subtracting 0 from 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 9:
15 goes into 30 2 times with a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 3569020.2
Deduct 30 from 30 and we're left 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.

Step 10:
15 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3569020.2
Deduct 0 from 0 and we're left 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 11:
If we divide 0 by 15, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 3569020.2
If we subtract 0 from 0, we 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 final result is 3569020.2 with a remainder of 0.0.