639863 divided by 7 
Our goal is to divide 639863 by 7.

Let's proceed to step 1:
If we divide 6 by 7, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 7

Going ahead to step 2:
If we divide 63 by 7, we get 9 and a remainder of 0.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Deduct 63 from 63 and we're left with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 7

Step 3:
The number 7 fits into 9 1 times, leaving a remainder of 2.
The next digit of our result is 1. 
Result so far: 91.0
Subtract 7 from 9 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 7

Moving on to step 4:
If we divide 28 by 7, we get 4 and a remainder of 0.
Record the quotient 4 as the next digit in the result. 
Result so far: 914.0
Deduct 28 from 28 and we're left with 0.
Include the next digit (6) from the dividend after 0, then repeat: 6 / 7

Going ahead to step 5:
If we divide 6 by 7, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 9140.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 7

Step 6:
When dividing 63 by 7, we get 9 with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 91409.0
The remainder is 0 after subtracting 63 from 63.
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 7:
7 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 91409.0
Subtract 0 from 0 to 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.

Going ahead to step 8:
If we divide 0 by 7, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 91409.0
Subtract 0 from 0 to 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.

After the division, we end up with 91409.0 and a remainder of 0.0.