666210 divided by 39 
We want to figure out the number of times 666210 can be divided by 39.

Advancing to step 1:
39 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 39

Moving on to step 2:
39 goes into 66 1 times with a remainder of 27.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 39 from 66 to get 27.
Take the next digit (6) from the dividend and append it to 27, then repeat: 276 / 39

Moving on to step 3:
When dividing 276 by 39, we get 7 with a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 17.0
If we subtract 273 from 276, we get 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 39

Let's proceed to step 4:
The number 39 fits into 32 0 times, leaving a remainder of 32.
Put 0 as the next digit of the answer. 
Result so far: 170.0
Deduct 0 from 32 and we're left with 32.
Include the next digit (1) from the dividend after 32, then repeat: 321 / 39

On to step 5:
When dividing 321 by 39, we get 8 with a remainder of 9.
Put 8 as the next digit of the answer. 
Result so far: 1708.0
Subtracting 312 from 321 leaves us with 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 39

Moving on to step 6:
When dividing 90 by 39, we get 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 17082.0
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.

On to step 7:
39 can be fit into 120 3 times, resulting in a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 17082.3
Subtracting 117 from 120 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 8:
30 divided by 39 is 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 17082.3
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.

Advancing to step 9:
When dividing 300 by 39, we get 7 with a remainder of 27.
Write down 7 as next digit of the result. 
Result so far: 17082.307
Deduct 273 from 300 and we're left 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.

Step 10:
39 goes into 270 6 times with a remainder of 36.
Write down 6 as next digit of the result. 
Result so far: 17082.3076
The remainder is 36 after subtracting 234 from 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 11:
39 goes into 360 9 times with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 17082.30769
If we subtract 351 from 360, we 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.

Step 12:
If we divide 90 by 39, we get 2 and a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 17082.307692
Subtract 78 from 90 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
The number 39 fits into 120 3 times, leaving a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 17082.3076923
If we take 117 away from 120, we end up with 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 14:
When dividing 30 by 39, we get 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 17082.3076923
If we take 0 away from 30, we end up 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.

The final result is 17082.3076923 with a remainder of 3e-08.