5590660 ÷ 640 
We want to figure out the number of times 5590660 can be divided by 640.

Let's proceed to step 1:
If we divide 5 by 640, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (5) of the dividend behind the 5 and repeat the process: 55 / 640

On to step 2:
The number 640 fits into 55 0 times, leaving a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 55, we get 55.
Append the next digit (9) from the dividend to 55 and continue with: 559 / 640

Step 3:
When dividing 559 by 640, we get 0 with a remainder of 559.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 559 and we're left with 559.
Grab the next digit (0) from the dividend, add it to 559, then carry on: 5590 / 640

On to step 4:
When dividing 5590 by 640, we get 8 with a remainder of 470.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 470 after subtracting 5120 from 5590.
Bring next digit (6) of the dividend behind the 470 and repeat the process: 4706 / 640

On to step 5:
If we divide 4706 by 640, we get 7 and a remainder of 226.
Write down 7 as next digit of the result. 
Result so far: 87.0
The remainder is 226 after subtracting 4480 from 4706.
Grab the next digit (6) from the dividend, add it to 226, then carry on: 2266 / 640

Step 6:
If we divide 2266 by 640, we get 3 and a remainder of 346.
The number 3 becomes the next digit in our result. 
Result so far: 873.0
Subtract 1920 from 2266 to get 346.
Append the next digit (0) from the dividend to 346 and continue with: 3460 / 640

Moving on to step 7:
The number 640 fits into 3460 5 times, leaving a remainder of 260.
Write down 5 as next digit of the result. 
Result so far: 8735.0
If we subtract 3200 from 3460, we get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 8:
When dividing 2600 by 640, we get 4 with a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 8735.4
The remainder is 40 after subtracting 2560 from 2600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing 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: 8735.4
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

On to step 10:
The number 640 fits into 4000 6 times, leaving a remainder of 160.
Write down 6 as next digit of the result. 
Result so far: 8735.406
If we subtract 3840 from 4000, we 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.

Going ahead to step 11:
640 goes into 1600 2 times with a remainder of 320.
Write down 2 as next digit of the result. 
Result so far: 8735.4062
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.

Step 12:
If we divide 3200 by 640, we get 5 and a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 8735.40625
Subtracting 3200 from 3200 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.

Going ahead to step 13:
640 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 8735.40625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 14:
When dividing 0 by 640, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 8735.40625
The remainder is 0 after subtracting 0 from 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 8735.40625 with a remainder of 0.0.