57810949 ÷ 640 
We're looking to find how many times 640 goes into 57810949.

Moving on to step 1:
640 can be fit into 5 0 times, resulting in a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 640

Step 2:
640 goes into 57 0 times with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 57 and we're left with 57.
Include the next digit (8) from the dividend after 57, then repeat: 578 / 640

Let's proceed to step 3:
The number 640 fits into 578 0 times, leaving a remainder of 578.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 578 and we're left with 578.
Grab the next digit (1) from the dividend, add it to 578, then carry on: 5781 / 640

Advancing to step 4:
640 can be fit into 5781 9 times, resulting in a remainder of 21.
Write down 9 as next digit of the result. 
Result so far: 9.0
The remainder is 21 after subtracting 5760 from 5781.
Append the next digit (0) from the dividend to 21 and continue with: 210 / 640

Let's proceed to step 5:
The number 640 fits into 210 0 times, leaving a remainder of 210.
Use 0 as the next digit of our solution. 
Result so far: 90.0
If we take 0 away from 210, we end up with 210.
Bring next digit (9) of the dividend behind the 210 and repeat the process: 2109 / 640

On to step 6:
640 can be fit into 2109 3 times, resulting in a remainder of 189.
The number 3 becomes the next digit in our result. 
Result so far: 903.0
Subtracting 1920 from 2109 leaves us with 189.
Append the next digit (4) from the dividend to 189 and continue with: 1894 / 640

Going ahead to step 7:
If we divide 1894 by 640, we get 2 and a remainder of 614.
Use 2 as the next digit of our solution. 
Result so far: 9032.0
The remainder is 614 after subtracting 1280 from 1894.
Append the next digit (9) from the dividend to 614 and continue with: 6149 / 640

On to step 8:
The number 640 fits into 6149 9 times, leaving a remainder of 389.
The number 9 becomes the next digit in our result. 
Result so far: 90329.0
Deduct 5760 from 6149 and we're left with 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Moving on to step 9:
If we divide 3890 by 640, we get 6 and a remainder of 50.
Use 6 as the next digit of our solution. 
Result so far: 90329.6
The remainder is 50 after subtracting 3840 from 3890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 10:
500 divided by 640 is 0 with a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 90329.6
If we take 0 away from 500, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Moving on to step 11:
640 can be fit into 5000 7 times, resulting in a remainder of 520.
The number 7 becomes the next digit in our result. 
Result so far: 90329.607
If we take 4480 away from 5000, we end up 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:
640 can be fit into 5200 8 times, resulting in a remainder of 80.
The next digit of our result is 8. 
Result so far: 90329.6078
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:
800 divided by 640 is 1 with a remainder of 160.
Put 1 as the next digit of the answer. 
Result so far: 90329.60781
Subtract 640 from 800 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 14:
The number 640 fits into 1600 2 times, leaving a remainder of 320.
Use 2 as the next digit of our solution. 
Result so far: 90329.607812
Subtracting 1280 from 1600 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.

Advancing to step 15:
640 goes into 3200 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 90329.6078125
If we take 3200 away from 3200, 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.

Step 16:
If we divide 0 by 640, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 90329.6078125
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.

The final result is 90329.6078125 with a remainder of 0.0.