We're dividing 87959975 by 640 
We want to divide 87959975 by 640.

On to step 1:
640 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 640

Let's proceed to step 2:
640 goes into 87 0 times with a remainder of 87.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 87, we end up with 87.
Append the next digit (9) from the dividend to 87 and continue with: 879 / 640

Step 3:
If we divide 879 by 640, we get 1 and a remainder of 239.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 239 after subtracting 640 from 879.
Fetch the next digit (5) from the dividend, attach it to 239 and continue: 2395 / 640

Moving on to step 4:
The number 640 fits into 2395 3 times, leaving a remainder of 475.
The next digit of our result is 3. 
Result so far: 13.0
Subtracting 1920 from 2395 leaves us with 475.
Fetch the next digit (9) from the dividend, attach it to 475 and continue: 4759 / 640

Going ahead to step 5:
640 can be fit into 4759 7 times, resulting in a remainder of 279.
The next digit of our result is 7. 
Result so far: 137.0
Subtract 4480 from 4759 to get 279.
Include the next digit (9) from the dividend after 279, then repeat: 2799 / 640

Step 6:
2799 divided by 640 is 4 with a remainder of 239.
Write down 4 as next digit of the result. 
Result so far: 1374.0
If we take 2560 away from 2799, we end up with 239.
Include the next digit (7) from the dividend after 239, then repeat: 2397 / 640

Step 7:
640 goes into 2397 3 times with a remainder of 477.
Record the quotient 3 as the next digit in the result. 
Result so far: 13743.0
Subtracting 1920 from 2397 leaves us with 477.
Bring next digit (5) of the dividend behind the 477 and repeat the process: 4775 / 640

Moving on to step 8:
When dividing 4775 by 640, we get 7 with a remainder of 295.
Use 7 as the next digit of our solution. 
Result so far: 137437.0
Subtracting 4480 from 4775 leaves us with 295.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2950, and continue the process.

Step 9:
640 goes into 2950 4 times with a remainder of 390.
Put 4 as the next digit of the answer. 
Result so far: 137437.4
If we subtract 2560 from 2950, we get 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 10:
640 can be fit into 3900 6 times, resulting in a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 137437.46
Subtracting 3840 from 3900 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 11:
600 divided by 640 is 0 with a remainder of 600.
Write down 0 as next digit of the result. 
Result so far: 137437.46
If we subtract 0 from 600, we get 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Step 12:
6000 divided by 640 is 9 with a remainder of 240.
Use 9 as the next digit of our solution. 
Result so far: 137437.4609
If we subtract 5760 from 6000, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 13:
640 goes into 2400 3 times with a remainder of 480.
Use 3 as the next digit of our solution. 
Result so far: 137437.46093
Subtract 1920 from 2400 to get 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

Going ahead to step 14:
When dividing 4800 by 640, we get 7 with a remainder of 320.
Use 7 as the next digit of our solution. 
Result so far: 137437.460937
Subtracting 4480 from 4800 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 15:
When dividing 3200 by 640, we get 5 with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 137437.4609375
Deduct 3200 from 3200 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.

Moving on to step 16:
640 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 137437.4609375
Subtracting 0 from 0 leaves us 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 137437.4609375 with a balance of 0.0.