We look at the division of 53399709 by 455 
We're looking to find how many times 455 goes into 53399709.

Going ahead to step 1:
When dividing 5 by 455, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 455

Going ahead to step 2:
455 can be fit into 53 0 times, resulting in a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 53, we end up with 53.
Bring next digit (3) of the dividend behind the 53 and repeat the process: 533 / 455

On to step 3:
When dividing 533 by 455, we get 1 with a remainder of 78.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 455 from 533 to get 78.
Fetch the next digit (9) from the dividend, attach it to 78 and continue: 789 / 455

On to step 4:
455 can be fit into 789 1 times, resulting in a remainder of 334.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 455 from 789 leaves us with 334.
Append the next digit (9) from the dividend to 334 and continue with: 3349 / 455

Step 5:
3349 divided by 455 is 7 with a remainder of 164.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
The remainder is 164 after subtracting 3185 from 3349.
Fetch the next digit (7) from the dividend, attach it to 164 and continue: 1647 / 455

Going ahead to step 6:
455 goes into 1647 3 times with a remainder of 282.
The number 3 becomes the next digit in our result. 
Result so far: 1173.0
Subtracting 1365 from 1647 leaves us with 282.
Append the next digit (0) from the dividend to 282 and continue with: 2820 / 455

Moving on to step 7:
455 goes into 2820 6 times with a remainder of 90.
Record the quotient 6 as the next digit in the result. 
Result so far: 11736.0
If we take 2730 away from 2820, we end up with 90.
Fetch the next digit (9) from the dividend, attach it to 90 and continue: 909 / 455

Moving on to step 8:
When dividing 909 by 455, we get 1 with a remainder of 454.
The number 1 becomes the next digit in our result. 
Result so far: 117361.0
If we take 455 away from 909, we end up with 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

On to step 9:
When dividing 4540 by 455, we get 9 with a remainder of 445.
Use 9 as the next digit of our solution. 
Result so far: 117361.9
The remainder is 445 after subtracting 4095 from 4540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4450, and continue the process.

Let's proceed to step 10:
455 goes into 4450 9 times with a remainder of 355.
Put 9 as the next digit of the answer. 
Result so far: 117361.99
If we take 4095 away from 4450, we end up with 355.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3550, and continue the process.

The final outcome is 117361.99, with a leftover of 0.355.