66436736 divided by 640 
We want to divide 66436736 by 640.

Let's proceed to step 1:
640 can be fit into 6 0 times, resulting in a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 640

Step 2:
66 divided by 640 is 0 with a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Append the next digit (4) from the dividend to 66 and continue with: 664 / 640

Advancing to step 3:
If we divide 664 by 640, we get 1 and a remainder of 24.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 640 from 664, we get 24.
Fetch the next digit (3) from the dividend, attach it to 24 and continue: 243 / 640

Advancing to step 4:
243 divided by 640 is 0 with a remainder of 243.
Write down 0 as next digit of the result. 
Result so far: 10.0
If we take 0 away from 243, we end up with 243.
Grab the next digit (6) from the dividend, add it to 243, then carry on: 2436 / 640

Let's proceed to step 5:
640 goes into 2436 3 times with a remainder of 516.
Write down 3 as next digit of the result. 
Result so far: 103.0
Subtracting 1920 from 2436 leaves us with 516.
Take the next digit (7) from the dividend and append it to 516, then repeat: 5167 / 640

Going ahead to step 6:
640 can be fit into 5167 8 times, resulting in a remainder of 47.
Put 8 as the next digit of the answer. 
Result so far: 1038.0
The remainder is 47 after subtracting 5120 from 5167.
Fetch the next digit (3) from the dividend, attach it to 47 and continue: 473 / 640

Advancing to step 7:
If we divide 473 by 640, we get 0 and a remainder of 473.
The next digit of our result is 0. 
Result so far: 10380.0
Subtracting 0 from 473 leaves us with 473.
Include the next digit (6) from the dividend after 473, then repeat: 4736 / 640

Going ahead to step 8:
The number 640 fits into 4736 7 times, leaving a remainder of 256.
Use 7 as the next digit of our solution. 
Result so far: 103807.0
Deduct 4480 from 4736 and we're left with 256.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Step 9:
2560 divided by 640 is 4 with a remainder of 0.
Use 4 as the next digit of our solution. 
Result so far: 103807.4
The remainder is 0 after subtracting 2560 from 2560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 10:
640 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 103807.4
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.

Moving on to step 11:
640 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: 103807.4
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.

In conclusion, the division gives 103807.4 with a balance of 0.0.