We're dividing 54465939 by 345 
We want to divide 54465939 by 345.

Moving on to step 1:
If we divide 5 by 345, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 345

On to step 2:
54 divided by 345 is 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 54 and we're left with 54.
Fetch the next digit (4) from the dividend, attach it to 54 and continue: 544 / 345

Advancing to step 3:
345 can be fit into 544 1 times, resulting in a remainder of 199.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 345 away from 544, we end up with 199.
Fetch the next digit (6) from the dividend, attach it to 199 and continue: 1996 / 345

Going ahead to step 4:
The number 345 fits into 1996 5 times, leaving a remainder of 271.
The next digit of our result is 5. 
Result so far: 15.0
If we subtract 1725 from 1996, we get 271.
Append the next digit (5) from the dividend to 271 and continue with: 2715 / 345

Step 5:
2715 divided by 345 is 7 with a remainder of 300.
The number 7 becomes the next digit in our result. 
Result so far: 157.0
The remainder is 300 after subtracting 2415 from 2715.
Take the next digit (9) from the dividend and append it to 300, then repeat: 3009 / 345

Going ahead to step 6:
345 can be fit into 3009 8 times, resulting in a remainder of 249.
Record the quotient 8 as the next digit in the result. 
Result so far: 1578.0
The remainder is 249 after subtracting 2760 from 3009.
Bring next digit (3) of the dividend behind the 249 and repeat the process: 2493 / 345

Advancing to step 7:
If we divide 2493 by 345, we get 7 and a remainder of 78.
The next digit of our result is 7. 
Result so far: 15787.0
Subtracting 2415 from 2493 leaves us with 78.
Grab the next digit (9) from the dividend, add it to 78, then carry on: 789 / 345

Going ahead to step 8:
The number 345 fits into 789 2 times, leaving a remainder of 99.
The number 2 becomes the next digit in our result. 
Result so far: 157872.0
Subtracting 690 from 789 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

On to step 9:
345 can be fit into 990 2 times, resulting in a remainder of 300.
The number 2 becomes the next digit in our result. 
Result so far: 157872.2
Deduct 690 from 990 and we're left with 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

Advancing to step 10:
If we divide 3000 by 345, we get 8 and a remainder of 240.
Put 8 as the next digit of the answer. 
Result so far: 157872.28
If we subtract 2760 from 3000, 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.

Step 11:
2400 divided by 345 is 6 with a remainder of 330.
Write down 6 as next digit of the result. 
Result so far: 157872.286
If we take 2070 away from 2400, we end up with 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Going ahead to step 12:
345 can be fit into 3300 9 times, resulting in a remainder of 195.
The next digit of our result is 9. 
Result so far: 157872.2869
If we take 3105 away from 3300, we end up with 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Advancing to step 13:
If we divide 1950 by 345, we get 5 and a remainder of 225.
Use 5 as the next digit of our solution. 
Result so far: 157872.28695
Subtract 1725 from 1950 to get 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Let's proceed to step 14:
The number 345 fits into 2250 6 times, leaving a remainder of 180.
Use 6 as the next digit of our solution. 
Result so far: 157872.286956
Subtract 2070 from 2250 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 15:
345 goes into 1800 5 times with a remainder of 75.
Use 5 as the next digit of our solution. 
Result so far: 157872.2869565
If we take 1725 away from 1800, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 16:
If we divide 750 by 345, we get 2 and a remainder of 60.
Use 2 as the next digit of our solution. 
Result so far: 157872.28695652
If we subtract 690 from 750, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The final result is 157872.28695652 with a remainder of 6e-08.