Let's divide 137942 by 39
We want to figure out the number of times 137942 can be divided by 39.

Advancing to step 1:
39 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 39

Step 2:
39 can be fit into 13 0 times, resulting in a remainder of 13.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 13 after subtracting 0 from 13.
Take the next digit (7) from the dividend and append it to 13, then repeat: 137 / 39

Going ahead to step 3:
When dividing 137 by 39, we get 3 with a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 117 from 137 to get 20.
Include the next digit (9) from the dividend after 20, then repeat: 209 / 39

Going ahead to step 4:
When dividing 209 by 39, we get 5 with a remainder of 14.
Use 5 as the next digit of our solution. 
Result so far: 35.0
Subtracting 195 from 209 leaves us with 14.
Include the next digit (4) from the dividend after 14, then repeat: 144 / 39

Going ahead to step 5:
39 can be fit into 144 3 times, resulting in a remainder of 27.
Put 3 as the next digit of the answer. 
Result so far: 353.0
The remainder is 27 after subtracting 117 from 144.
Bring next digit (2) of the dividend behind the 27 and repeat the process: 272 / 39

On to step 6:
39 can be fit into 272 6 times, resulting in a remainder of 38.
Record the quotient 6 as the next digit in the result. 
Result so far: 3536.0
Subtracting 234 from 272 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 7:
380 divided by 39 is 9 with a remainder of 29.
Write down 9 as next digit of the result. 
Result so far: 3536.9
Subtract 351 from 380 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 8:
When dividing 290 by 39, we get 7 with a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 3536.97
Subtract 273 from 290 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
When dividing 170 by 39, we get 4 with a remainder of 14.
The next digit of our result is 4. 
Result so far: 3536.974
Subtract 156 from 170 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 10:
39 can be fit into 140 3 times, resulting in a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 3536.9743
The remainder is 23 after subtracting 117 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 11:
39 goes into 230 5 times with a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 3536.97435
Deduct 195 from 230 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Moving on to step 12:
When dividing 350 by 39, we get 8 with a remainder of 38.
Use 8 as the next digit of our solution. 
Result so far: 3536.974358
Deduct 312 from 350 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 13:
If we divide 380 by 39, we get 9 and a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 3536.9743589
If we take 351 away from 380, we end up with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Let's proceed to step 14:
If we divide 290 by 39, we get 7 and a remainder of 17.
Use 7 as the next digit of our solution. 
Result so far: 3536.97435897
If we subtract 273 from 290, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

The final outcome is 3536.97435897, with a leftover of 1.7e-08.