54465618 ÷ 354 
We want to divide 54465618 by 354.

Advancing to step 1:
5 divided by 354 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (4) from the dividend after 5, then repeat: 54 / 354

Going ahead to step 2:
54 divided by 354 is 0 with a remainder of 54.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Include the next digit (4) from the dividend after 54, then repeat: 544 / 354

Let's proceed to step 3:
544 divided by 354 is 1 with a remainder of 190.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 354 from 544 to get 190.
Append the next digit (6) from the dividend to 190 and continue with: 1906 / 354

Moving on to step 4:
The number 354 fits into 1906 5 times, leaving a remainder of 136.
The next digit of our result is 5. 
Result so far: 15.0
Deduct 1770 from 1906 and we're left with 136.
Include the next digit (5) from the dividend after 136, then repeat: 1365 / 354

Moving on to step 5:
354 can be fit into 1365 3 times, resulting in a remainder of 303.
Write down 3 as next digit of the result. 
Result so far: 153.0
The remainder is 303 after subtracting 1062 from 1365.
Fetch the next digit (6) from the dividend, attach it to 303 and continue: 3036 / 354

Step 6:
If we divide 3036 by 354, we get 8 and a remainder of 204.
Record the quotient 8 as the next digit in the result. 
Result so far: 1538.0
The remainder is 204 after subtracting 2832 from 3036.
Append the next digit (1) from the dividend to 204 and continue with: 2041 / 354

Going ahead to step 7:
If we divide 2041 by 354, we get 5 and a remainder of 271.
Write down 5 as next digit of the result. 
Result so far: 15385.0
Subtracting 1770 from 2041 leaves us with 271.
Append the next digit (8) from the dividend to 271 and continue with: 2718 / 354

Let's proceed to step 8:
354 can be fit into 2718 7 times, resulting in a remainder of 240.
The next digit of our result is 7. 
Result so far: 153857.0
If we subtract 2478 from 2718, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 9:
2400 divided by 354 is 6 with a remainder of 276.
The next digit of our result is 6. 
Result so far: 153857.6
The remainder is 276 after subtracting 2124 from 2400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Step 10:
354 goes into 2760 7 times with a remainder of 282.
Put 7 as the next digit of the answer. 
Result so far: 153857.67
Subtract 2478 from 2760 to get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Step 11:
2820 divided by 354 is 7 with a remainder of 342.
Use 7 as the next digit of our solution. 
Result so far: 153857.677
Deduct 2478 from 2820 and we're left with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

The final outcome is 153857.677, with a leftover of 0.0342.