639192 ÷ 15 
Our goal is to divide 639192 by 15.

Advancing to step 1:
15 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 15

Advancing to step 2:
15 goes into 63 4 times with a remainder of 3.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 60 from 63 and we're left with 3.
Include the next digit (9) from the dividend after 3, then repeat: 39 / 15

Moving on to step 3:
If we divide 39 by 15, we get 2 and a remainder of 9.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we subtract 30 from 39, we get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 15

Advancing to step 4:
15 goes into 91 6 times with a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 426.0
If we subtract 90 from 91, we get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 15

Step 5:
When dividing 19 by 15, we get 1 with a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 4261.0
The remainder is 4 after subtracting 15 from 19.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 15

Let's proceed to step 6:
15 goes into 42 2 times with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 42612.0
If we subtract 30 from 42, we 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.

Moving on to step 7:
When dividing 120 by 15, we get 8 with a remainder of 0.
Record the quotient 8 as the next digit in the result. 
Result so far: 42612.8
Deduct 120 from 120 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 42612.8
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 9:
If we divide 0 by 15, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42612.8
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 42612.8 with a balance of 0.0.