We look at the division of 154353 by 39 
We want to figure out the number of times 154353 can be divided by 39.

On to step 1:
If we divide 1 by 39, we get 0 and a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 39

Moving on to step 2:
15 divided by 39 is 0 with a remainder of 15.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 15 leaves us with 15.
Take the next digit (4) from the dividend and append it to 15, then repeat: 154 / 39

Let's proceed to step 3:
If we divide 154 by 39, we get 3 and a remainder of 37.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 117 from 154 leaves us with 37.
Take the next digit (3) from the dividend and append it to 37, then repeat: 373 / 39

Step 4:
If we divide 373 by 39, we get 9 and a remainder of 22.
The next digit of our result is 9. 
Result so far: 39.0
Subtracting 351 from 373 leaves us with 22.
Grab the next digit (5) from the dividend, add it to 22, then carry on: 225 / 39

Going ahead to step 5:
If we divide 225 by 39, we get 5 and a remainder of 30.
Write down 5 as next digit of the result. 
Result so far: 395.0
Subtract 195 from 225 to get 30.
Bring next digit (3) of the dividend behind the 30 and repeat the process: 303 / 39

Going ahead to step 6:
39 goes into 303 7 times with a remainder of 30.
The number 7 becomes the next digit in our result. 
Result so far: 3957.0
Subtract 273 from 303 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 7:
The number 39 fits into 300 7 times, leaving a remainder of 27.
Use 7 as the next digit of our solution. 
Result so far: 3957.7
If we subtract 273 from 300, we get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Going ahead to step 8:
39 can be fit into 270 6 times, resulting in a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 3957.76
If we take 234 away from 270, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
360 divided by 39 is 9 with a remainder of 9.
Use 9 as the next digit of our solution. 
Result so far: 3957.769
Subtract 351 from 360 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 10:
The number 39 fits into 90 2 times, leaving a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 3957.7692
If we take 78 away from 90, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 11:
39 goes into 120 3 times with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 3957.76923
Subtract 117 from 120 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 12:
If we divide 30 by 39, we get 0 and a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 3957.76923
Deduct 0 from 30 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 13:
39 can be fit into 300 7 times, resulting in a remainder of 27.
The next digit of our result is 7. 
Result so far: 3957.7692307
If we take 273 away from 300, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 14:
270 divided by 39 is 6 with a remainder of 36.
The next digit of our result is 6. 
Result so far: 3957.76923076
Subtract 234 from 270 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The final outcome is 3957.76923076, with a leftover of 3.6e-08.