We're dividing 403209 by 75 
Our goal is to divide 403209 by 75.

On to step 1:
When dividing 4 by 75, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (0) from the dividend and append it to 4, then repeat: 40 / 75

Let's proceed to step 2:
The number 75 fits into 40 0 times, leaving a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 40 to get 40.
Fetch the next digit (3) from the dividend, attach it to 40 and continue: 403 / 75

Going ahead to step 3:
403 divided by 75 is 5 with a remainder of 28.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Subtract 375 from 403 to get 28.
Fetch the next digit (2) from the dividend, attach it to 28 and continue: 282 / 75

Moving on to step 4:
The number 75 fits into 282 3 times, leaving a remainder of 57.
Put 3 as the next digit of the answer. 
Result so far: 53.0
Deduct 225 from 282 and we're left with 57.
Append the next digit (0) from the dividend to 57 and continue with: 570 / 75

Advancing to step 5:
570 divided by 75 is 7 with a remainder of 45.
The number 7 becomes the next digit in our result. 
Result so far: 537.0
If we take 525 away from 570, we end up with 45.
Append the next digit (9) from the dividend to 45 and continue with: 459 / 75

Step 6:
When dividing 459 by 75, we get 6 with a remainder of 9.
The next digit of our result is 6. 
Result so far: 5376.0
If we take 450 away from 459, we end up 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.

Step 7:
The number 75 fits into 90 1 times, leaving a remainder of 15.
The next digit of our result is 1. 
Result so far: 5376.1
Subtracting 75 from 90 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 8:
75 goes into 150 2 times with a remainder of 0.
The next digit of our result is 2. 
Result so far: 5376.12
Subtract 150 from 150 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.

Step 9:
When dividing 0 by 75, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5376.12
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 10:
When dividing 0 by 75, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 5376.12
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 outcome is 5376.12, with a leftover of 0.0.