20677800 divided by 640 
We're looking to find how many times 640 goes into 20677800.

On to step 1:
The number 640 fits into 2 0 times, leaving a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 640

Moving on to step 2:
20 divided by 640 is 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Fetch the next digit (6) from the dividend, attach it to 20 and continue: 206 / 640

Let's proceed to step 3:
206 divided by 640 is 0 with a remainder of 206.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 206 after subtracting 0 from 206.
Include the next digit (7) from the dividend after 206, then repeat: 2067 / 640

On to step 4:
640 goes into 2067 3 times with a remainder of 147.
Write down 3 as next digit of the result. 
Result so far: 3.0
The remainder is 147 after subtracting 1920 from 2067.
Take the next digit (7) from the dividend and append it to 147, then repeat: 1477 / 640

Moving on to step 5:
640 goes into 1477 2 times with a remainder of 197.
Use 2 as the next digit of our solution. 
Result so far: 32.0
The remainder is 197 after subtracting 1280 from 1477.
Grab the next digit (8) from the dividend, add it to 197, then carry on: 1978 / 640

Step 6:
When dividing 1978 by 640, we get 3 with a remainder of 58.
Write down 3 as next digit of the result. 
Result so far: 323.0
Deduct 1920 from 1978 and we're left with 58.
Grab the next digit (0) from the dividend, add it to 58, then carry on: 580 / 640

Moving on to step 7:
580 divided by 640 is 0 with a remainder of 580.
Write down 0 as next digit of the result. 
Result so far: 3230.0
If we subtract 0 from 580, we get 580.
Include the next digit (0) from the dividend after 580, then repeat: 5800 / 640

Moving on to step 8:
When dividing 5800 by 640, we get 9 with a remainder of 40.
Use 9 as the next digit of our solution. 
Result so far: 32309.0
The remainder is 40 after subtracting 5760 from 5800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 9:
If we divide 400 by 640, we get 0 and a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 32309.0
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Let's proceed to step 10:
The number 640 fits into 4000 6 times, leaving a remainder of 160.
The number 6 becomes the next digit in our result. 
Result so far: 32309.06
Subtracting 3840 from 4000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 11:
The number 640 fits into 1600 2 times, leaving a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 32309.062
The remainder is 320 after subtracting 1280 from 1600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 12:
When dividing 3200 by 640, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 32309.0625
If we subtract 3200 from 3200, we 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.

Let's proceed to step 13:
0 divided by 640 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 32309.0625
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.

Let's proceed to step 14:
0 divided by 640 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 32309.0625
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 32309.0625 and a remainder of 0.0.