39518161 ÷ 709 
We want to figure out the number of times 39518161 can be divided by 709.

Advancing to step 1:
If we divide 3 by 709, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 709

Going ahead to step 2:
39 divided by 709 is 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 39 to get 39.
Append the next digit (5) from the dividend to 39 and continue with: 395 / 709

Going ahead to step 3:
709 goes into 395 0 times with a remainder of 395.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 395 to get 395.
Take the next digit (1) from the dividend and append it to 395, then repeat: 3951 / 709

Moving on to step 4:
The number 709 fits into 3951 5 times, leaving a remainder of 406.
Use 5 as the next digit of our solution. 
Result so far: 5.0
If we subtract 3545 from 3951, we get 406.
Take the next digit (8) from the dividend and append it to 406, then repeat: 4068 / 709

Advancing to step 5:
When dividing 4068 by 709, we get 5 with a remainder of 523.
Record the quotient 5 as the next digit in the result. 
Result so far: 55.0
Subtract 3545 from 4068 to get 523.
Take the next digit (1) from the dividend and append it to 523, then repeat: 5231 / 709

Moving on to step 6:
The number 709 fits into 5231 7 times, leaving a remainder of 268.
The number 7 becomes the next digit in our result. 
Result so far: 557.0
Subtracting 4963 from 5231 leaves us with 268.
Append the next digit (6) from the dividend to 268 and continue with: 2686 / 709

On to step 7:
The number 709 fits into 2686 3 times, leaving a remainder of 559.
The next digit of our result is 3. 
Result so far: 5573.0
Subtracting 2127 from 2686 leaves us with 559.
Include the next digit (1) from the dividend after 559, then repeat: 5591 / 709

On to step 8:
5591 divided by 709 is 7 with a remainder of 628.
Use 7 as the next digit of our solution. 
Result so far: 55737.0
Deduct 4963 from 5591 and we're left with 628.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6280, and continue the process.

Advancing to step 9:
709 can be fit into 6280 8 times, resulting in a remainder of 608.
Write down 8 as next digit of the result. 
Result so far: 55737.8
Deduct 5672 from 6280 and we're left with 608.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6080, and continue the process.

On to step 10:
The number 709 fits into 6080 8 times, leaving a remainder of 408.
Put 8 as the next digit of the answer. 
Result so far: 55737.88
If we take 5672 away from 6080, we end up with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

The final result is 55737.88 with a remainder of 0.408.