We divide 639198 by 17
We want to figure out the number of times 639198 can be divided by 17.

Moving on to step 1:
17 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 17

Let's proceed to step 2:
17 goes into 63 3 times with a remainder of 12.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 51 from 63 to get 12.
Grab the next digit (9) from the dividend, add it to 12, then carry on: 129 / 17

Moving on to step 3:
129 divided by 17 is 7 with a remainder of 10.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we subtract 119 from 129, we get 10.
Append the next digit (1) from the dividend to 10 and continue with: 101 / 17

Moving on to step 4:
If we divide 101 by 17, we get 5 and a remainder of 16.
Record the quotient 5 as the next digit in the result. 
Result so far: 375.0
If we subtract 85 from 101, we get 16.
Bring next digit (9) of the dividend behind the 16 and repeat the process: 169 / 17

On to step 5:
17 goes into 169 9 times with a remainder of 16.
Write down 9 as next digit of the result. 
Result so far: 3759.0
If we subtract 153 from 169, we get 16.
Include the next digit (8) from the dividend after 16, then repeat: 168 / 17

Let's proceed to step 6:
17 can be fit into 168 9 times, resulting in a remainder of 15.
The number 9 becomes the next digit in our result. 
Result so far: 37599.0
If we subtract 153 from 168, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 7:
17 goes into 150 8 times with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 37599.8
Subtracting 136 from 150 leaves us 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.

Moving on to step 8:
17 goes into 140 8 times with a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 37599.88
Deduct 136 from 140 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.

After the division, we end up with 37599.88 and a remainder of 0.004.