51731605 divided by 640 
We want to divide 51731605 by 640.

Advancing to step 1:
5 divided by 640 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 640

Let's proceed to step 2:
640 can be fit into 51 0 times, resulting in a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Append the next digit (7) from the dividend to 51 and continue with: 517 / 640

On to step 3:
If we divide 517 by 640, we get 0 and a remainder of 517.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 517 after subtracting 0 from 517.
Append the next digit (3) from the dividend to 517 and continue with: 5173 / 640

Advancing to step 4:
If we divide 5173 by 640, we get 8 and a remainder of 53.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 5120 from 5173 leaves us with 53.
Append the next digit (1) from the dividend to 53 and continue with: 531 / 640

Moving on to step 5:
640 goes into 531 0 times with a remainder of 531.
Write down 0 as next digit of the result. 
Result so far: 80.0
If we subtract 0 from 531, we get 531.
Bring next digit (6) of the dividend behind the 531 and repeat the process: 5316 / 640

Let's proceed to step 6:
5316 divided by 640 is 8 with a remainder of 196.
The number 8 becomes the next digit in our result. 
Result so far: 808.0
If we take 5120 away from 5316, we end up with 196.
Grab the next digit (0) from the dividend, add it to 196, then carry on: 1960 / 640

Let's proceed to step 7:
1960 divided by 640 is 3 with a remainder of 40.
The number 3 becomes the next digit in our result. 
Result so far: 8083.0
The remainder is 40 after subtracting 1920 from 1960.
Bring next digit (5) of the dividend behind the 40 and repeat the process: 405 / 640

Let's proceed to step 8:
If we divide 405 by 640, we get 0 and a remainder of 405.
Put 0 as the next digit of the answer. 
Result so far: 80830.0
If we take 0 away from 405, we end up with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Step 9:
When dividing 4050 by 640, we get 6 with a remainder of 210.
The next digit of our result is 6. 
Result so far: 80830.6
The remainder is 210 after subtracting 3840 from 4050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 10:
When dividing 2100 by 640, we get 3 with a remainder of 180.
Put 3 as the next digit of the answer. 
Result so far: 80830.63
Subtracting 1920 from 2100 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Going ahead to step 11:
When dividing 1800 by 640, we get 2 with a remainder of 520.
Put 2 as the next digit of the answer. 
Result so far: 80830.632
Subtracting 1280 from 1800 leaves us with 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5200, and continue the process.

Going ahead to step 12:
If we divide 5200 by 640, we get 8 and a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 80830.6328
Subtracting 5120 from 5200 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 13:
When dividing 800 by 640, we get 1 with a remainder of 160.
Write down 1 as next digit of the result. 
Result so far: 80830.63281
If we take 640 away from 800, we end up 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.

Advancing to step 14:
640 goes into 1600 2 times with a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 80830.632812
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.

Going ahead to step 15:
640 goes into 3200 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 80830.6328125
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.

On to step 16:
The number 640 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 80830.6328125
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.

After the division, we end up with 80830.6328125 and a remainder of 0.0.