We divide 54129353 by 39
We want to figure out the number of times 54129353 can be divided by 39.

Let's proceed to step 1:
39 goes into 5 0 times 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.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 39

Step 2:
39 can be fit into 54 1 times, resulting in a remainder of 15.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 15 after subtracting 39 from 54.
Take the next digit (1) from the dividend and append it to 15, then repeat: 151 / 39

Going ahead to step 3:
39 can be fit into 151 3 times, resulting in a remainder of 34.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 117 from 151 leaves us with 34.
Take the next digit (2) from the dividend and append it to 34, then repeat: 342 / 39

Step 4:
If we divide 342 by 39, we get 8 and a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 138.0
If we subtract 312 from 342, we get 30.
Grab the next digit (9) from the dividend, add it to 30, then carry on: 309 / 39

Step 5:
39 goes into 309 7 times with a remainder of 36.
The next digit of our result is 7. 
Result so far: 1387.0
If we take 273 away from 309, we end up with 36.
Include the next digit (3) from the dividend after 36, then repeat: 363 / 39

Let's proceed to step 6:
363 divided by 39 is 9 with a remainder of 12.
The next digit of our result is 9. 
Result so far: 13879.0
Subtracting 351 from 363 leaves us with 12.
Grab the next digit (5) from the dividend, add it to 12, then carry on: 125 / 39

Advancing to step 7:
125 divided by 39 is 3 with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 138793.0
Subtracting 117 from 125 leaves us with 8.
Append the next digit (3) from the dividend to 8 and continue with: 83 / 39

Let's proceed to step 8:
39 can be fit into 83 2 times, resulting in a remainder of 5.
The number 2 becomes the next digit in our result. 
Result so far: 1387932.0
Deduct 78 from 83 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 9:
When dividing 50 by 39, we get 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1387932.1
If we subtract 39 from 50, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 10:
39 can be fit into 110 2 times, resulting in a remainder of 32.
Record the quotient 2 as the next digit in the result. 
Result so far: 1387932.12
If we take 78 away from 110, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 11:
When dividing 320 by 39, we get 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 1387932.128
The remainder is 8 after subtracting 312 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 12:
The number 39 fits into 80 2 times, leaving a remainder of 2.
The next digit of our result is 2. 
Result so far: 1387932.1282
Subtracting 78 from 80 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 13:
When dividing 20 by 39, we get 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 1387932.1282
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 14:
200 divided by 39 is 5 with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 1387932.128205
Deduct 195 from 200 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 15:
50 divided by 39 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1387932.1282051
Subtracting 39 from 50 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 16:
110 divided by 39 is 2 with a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 1387932.12820512
Subtract 78 from 110 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 1387932.12820512, with a leftover of 3.2e-08.