54608165 ÷ 420 
We're looking to find how many times 420 goes into 54608165.

On to step 1:
5 divided by 420 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 420

On to step 2:
420 goes into 54 0 times with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 54 to get 54.
Bring next digit (6) of the dividend behind the 54 and repeat the process: 546 / 420

Moving on to step 3:
420 goes into 546 1 times with a remainder of 126.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 420 away from 546, we end up with 126.
Append the next digit (0) from the dividend to 126 and continue with: 1260 / 420

Let's proceed to step 4:
When dividing 1260 by 420, we get 3 with a remainder of 0.
Write down 3 as next digit of the result. 
Result so far: 13.0
If we subtract 1260 from 1260, we get 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 420

Let's proceed to step 5:
8 divided by 420 is 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 130.0
Subtracting 0 from 8 leaves us with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 420

Step 6:
If we divide 81 by 420, we get 0 and a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 1300.0
Deduct 0 from 81 and we're left with 81.
Fetch the next digit (6) from the dividend, attach it to 81 and continue: 816 / 420

Advancing to step 7:
If we divide 816 by 420, we get 1 and a remainder of 396.
The number 1 becomes the next digit in our result. 
Result so far: 13001.0
Subtract 420 from 816 to get 396.
Append the next digit (5) from the dividend to 396 and continue with: 3965 / 420

Moving on to step 8:
420 can be fit into 3965 9 times, resulting in a remainder of 185.
Record the quotient 9 as the next digit in the result. 
Result so far: 130019.0
Subtracting 3780 from 3965 leaves us with 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Going ahead to step 9:
The number 420 fits into 1850 4 times, leaving a remainder of 170.
Write down 4 as next digit of the result. 
Result so far: 130019.4
The remainder is 170 after subtracting 1680 from 1850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 10:
1700 divided by 420 is 4 with a remainder of 20.
Use 4 as the next digit of our solution. 
Result so far: 130019.44
Deduct 1680 from 1700 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 130019.44, with a leftover of 0.02.