We look at the division of 640129 by 76 
We're looking to find how many times 76 goes into 640129.

Step 1:
76 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 76

Moving on to step 2:
If we divide 64 by 76, we get 0 and a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Grab the next digit (0) from the dividend, add it to 64, then carry on: 640 / 76

Step 3:
76 can be fit into 640 8 times, resulting in a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we take 608 away from 640, we end up with 32.
Grab the next digit (1) from the dividend, add it to 32, then carry on: 321 / 76

Step 4:
The number 76 fits into 321 4 times, leaving a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 84.0
The remainder is 17 after subtracting 304 from 321.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 76

On to step 5:
The number 76 fits into 172 2 times, leaving a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 842.0
If we subtract 152 from 172, we get 20.
Grab the next digit (9) from the dividend, add it to 20, then carry on: 209 / 76

Moving on to step 6:
76 can be fit into 209 2 times, resulting in a remainder of 57.
Put 2 as the next digit of the answer. 
Result so far: 8422.0
Subtracting 152 from 209 leaves us with 57.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Moving on to step 7:
76 goes into 570 7 times with a remainder of 38.
Put 7 as the next digit of the answer. 
Result so far: 8422.7
If we subtract 532 from 570, we get 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
If we divide 380 by 76, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 8422.75
If we take 380 away from 380, we end up 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.

Going ahead to step 9:
The number 76 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8422.75
If we take 0 away from 0, we end up 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 10:
76 goes into 0 0 times with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8422.75
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 8422.75 and a remainder of 0.0.