639038 ÷ 17 
We're looking to find how many times 17 goes into 639038.

On to step 1:
17 goes into 6 0 times with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 17

Moving on to step 2:
17 goes into 63 3 times with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 51 away from 63, we end up with 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 17

Moving on to step 3:
17 goes into 129 7 times with a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 37.0
Subtracting 119 from 129 leaves us with 10.
Grab the next digit (0) from the dividend, add it to 10, then carry on: 100 / 17

Let's proceed to step 4:
100 divided by 17 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 375.0
Subtracting 85 from 100 leaves us with 15.
Bring next digit (3) of the dividend behind the 15 and repeat the process: 153 / 17

Going ahead to step 5:
153 divided by 17 is 9 with a remainder of 0.
The next digit of our result is 9. 
Result so far: 3759.0
Deduct 153 from 153 and we're left with 0.
Fetch the next digit (8) from the dividend, attach it to 0 and continue: 8 / 17

Moving on to step 6:
8 divided by 17 is 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 37590.0
Subtracting 0 from 8 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
80 divided by 17 is 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 37590.4
Deduct 68 from 80 and we're left 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.

Step 8:
If we divide 120 by 17, we get 7 and a remainder of 1.
Write down 7 as next digit of the result. 
Result so far: 37590.47
Subtract 119 from 120 to 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.

Advancing to step 9:
17 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 37590.47
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 10:
17 goes into 100 5 times with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 37590.4705
Subtracting 85 from 100 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 11:
150 divided by 17 is 8 with a remainder of 14.
Write down 8 as next digit of the result. 
Result so far: 37590.47058
Deduct 136 from 150 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 12:
When dividing 140 by 17, we get 8 with a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 37590.470588
If we subtract 136 from 140, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 37590.470588, with a leftover of 4e-07.