57644239 ÷ 39 
We want to figure out the number of times 57644239 can be divided by 39.

Step 1:
39 can be fit into 5 0 times, resulting in a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 39

Moving on to step 2:
39 can be fit into 57 1 times, resulting in a remainder of 18.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 39 from 57 to get 18.
Grab the next digit (6) from the dividend, add it to 18, then carry on: 186 / 39

Moving on to step 3:
39 can be fit into 186 4 times, resulting in a remainder of 30.
Put 4 as the next digit of the answer. 
Result so far: 14.0
Deduct 156 from 186 and we're left with 30.
Include the next digit (4) from the dividend after 30, then repeat: 304 / 39

Step 4:
When dividing 304 by 39, we get 7 with a remainder of 31.
The number 7 becomes the next digit in our result. 
Result so far: 147.0
Deduct 273 from 304 and we're left with 31.
Include the next digit (4) from the dividend after 31, then repeat: 314 / 39

Let's proceed to step 5:
39 goes into 314 8 times with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 1478.0
Deduct 312 from 314 and we're left with 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 39

Let's proceed to step 6:
22 divided by 39 is 0 with a remainder of 22.
The number 0 becomes the next digit in our result. 
Result so far: 14780.0
Subtracting 0 from 22 leaves us with 22.
Grab the next digit (3) from the dividend, add it to 22, then carry on: 223 / 39

Going ahead to step 7:
When dividing 223 by 39, we get 5 with a remainder of 28.
Record the quotient 5 as the next digit in the result. 
Result so far: 147805.0
If we take 195 away from 223, we end up with 28.
Take the next digit (9) from the dividend and append it to 28, then repeat: 289 / 39

Advancing to step 8:
When dividing 289 by 39, we get 7 with a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 1478057.0
Deduct 273 from 289 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 9:
If we divide 160 by 39, we get 4 and a remainder of 4.
The next digit of our result is 4. 
Result so far: 1478057.4
Subtracting 156 from 160 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
39 can be fit into 40 1 times, resulting in a remainder of 1.
The next digit of our result is 1. 
Result so far: 1478057.41
If we subtract 39 from 40, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 11:
The number 39 fits into 10 0 times, leaving a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 1478057.41
Subtracting 0 from 10 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
39 goes into 100 2 times with a remainder of 22.
The next digit of our result is 2. 
Result so far: 1478057.4102
If we subtract 78 from 100, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 13:
39 can be fit into 220 5 times, resulting in a remainder of 25.
The next digit of our result is 5. 
Result so far: 1478057.41025
If we take 195 away from 220, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Moving on to step 14:
39 can be fit into 250 6 times, resulting in a remainder of 16.
The number 6 becomes the next digit in our result. 
Result so far: 1478057.410256
If we subtract 234 from 250, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 15:
When dividing 160 by 39, we get 4 with a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 1478057.4102564
Deduct 156 from 160 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 16:
The number 39 fits into 40 1 times, leaving a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 1478057.41025641
If we subtract 39 from 40, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final result is 1478057.41025641 with a remainder of 1e-09.