640239 ÷ 7 
We're looking to find how many times 7 goes into 640239.

Let's proceed to step 1:
When dividing 6 by 7, we get 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 7

Step 2:
When dividing 64 by 7, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 9.0
If we take 63 away from 64, we end up with 1.
Grab the next digit (0) from the dividend, add it to 1, then carry on: 10 / 7

Advancing to step 3:
When dividing 10 by 7, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 91.0
The remainder is 3 after subtracting 7 from 10.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 7

Moving on to step 4:
If we divide 32 by 7, we get 4 and a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 914.0
If we take 28 away from 32, we end up with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 7

Let's proceed to step 5:
The number 7 fits into 43 6 times, leaving a remainder of 1.
Record the quotient 6 as the next digit in the result. 
Result so far: 9146.0
If we subtract 42 from 43, we get 1.
Append the next digit (9) from the dividend to 1 and continue with: 19 / 7

Let's proceed to step 6:
7 goes into 19 2 times with a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 91462.0
If we take 14 away from 19, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
When dividing 50 by 7, we get 7 with a remainder of 1.
Put 7 as the next digit of the answer. 
Result so far: 91462.7
If we subtract 49 from 50, we 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.

Step 8:
7 can be fit into 10 1 times, resulting in a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 91462.71
Subtract 7 from 10 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 9:
7 goes into 30 4 times with a remainder of 2.
The next digit of our result is 4. 
Result so far: 91462.714
If we take 28 away from 30, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
7 goes into 20 2 times with a remainder of 6.
The next digit of our result is 2. 
Result so far: 91462.7142
If we subtract 14 from 20, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 11:
7 goes into 60 8 times with a remainder of 4.
Use 8 as the next digit of our solution. 
Result so far: 91462.71428
The remainder is 4 after subtracting 56 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 12:
The number 7 fits into 40 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 91462.714285
Subtract 35 from 40 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
The number 7 fits into 50 7 times, leaving a remainder of 1.
Record the quotient 7 as the next digit in the result. 
Result so far: 91462.7142857
Subtract 49 from 50 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.

Let's proceed to step 14:
The number 7 fits into 10 1 times, leaving a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 91462.71428571
Deduct 7 from 10 and we're left 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.

After the division, we end up with 91462.71428571 and a remainder of 3e-09.