We're dividing 90093313 by 640 
We want to figure out the number of times 90093313 can be divided by 640.

On to step 1:
The number 640 fits into 9 0 times, leaving a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 640

Let's proceed to step 2:
640 can be fit into 90 0 times, resulting in a remainder of 90.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 90, we end up with 90.
Append the next digit (0) from the dividend to 90 and continue with: 900 / 640

Step 3:
If we divide 900 by 640, we get 1 and a remainder of 260.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 640 from 900 and we're left with 260.
Grab the next digit (9) from the dividend, add it to 260, then carry on: 2609 / 640

Moving on to step 4:
If we divide 2609 by 640, we get 4 and a remainder of 49.
Write down 4 as next digit of the result. 
Result so far: 14.0
Deduct 2560 from 2609 and we're left with 49.
Include the next digit (3) from the dividend after 49, then repeat: 493 / 640

Advancing to step 5:
If we divide 493 by 640, we get 0 and a remainder of 493.
Put 0 as the next digit of the answer. 
Result so far: 140.0
Subtract 0 from 493 to get 493.
Take the next digit (3) from the dividend and append it to 493, then repeat: 4933 / 640

On to step 6:
When dividing 4933 by 640, we get 7 with a remainder of 453.
Record the quotient 7 as the next digit in the result. 
Result so far: 1407.0
The remainder is 453 after subtracting 4480 from 4933.
Grab the next digit (1) from the dividend, add it to 453, then carry on: 4531 / 640

On to step 7:
The number 640 fits into 4531 7 times, leaving a remainder of 51.
Record the quotient 7 as the next digit in the result. 
Result so far: 14077.0
Subtracting 4480 from 4531 leaves us with 51.
Fetch the next digit (3) from the dividend, attach it to 51 and continue: 513 / 640

Let's proceed to step 8:
The number 640 fits into 513 0 times, leaving a remainder of 513.
The next digit of our result is 0. 
Result so far: 140770.0
The remainder is 513 after subtracting 0 from 513.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5130, and continue the process.

On to step 9:
If we divide 5130 by 640, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 140770.8
Subtract 5120 from 5130 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 10:
640 goes into 100 0 times with a remainder of 100.
The next digit of our result is 0. 
Result so far: 140770.8
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 11:
640 goes into 1000 1 times with a remainder of 360.
The number 1 becomes the next digit in our result. 
Result so far: 140770.801
If we subtract 640 from 1000, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 12:
When dividing 3600 by 640, we get 5 with a remainder of 400.
Put 5 as the next digit of the answer. 
Result so far: 140770.8015
The remainder is 400 after subtracting 3200 from 3600.
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 13:
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: 140770.80156
If we take 3840 away from 4000, 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.

Going ahead 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: 140770.801562
Subtract 1280 from 1600 to get 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:
When dividing 3200 by 640, we get 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 140770.8015625
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.

Advancing to step 16:
If we divide 0 by 640, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 140770.8015625
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.

In conclusion, the division gives 140770.8015625 with a balance of 0.0.