74585620 divided by 640 
We're looking to find how many times 640 goes into 74585620.

Going ahead to step 1:
7 divided by 640 is 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 640

Advancing to step 2:
640 goes into 74 0 times with a remainder of 74.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 74, we get 74.
Include the next digit (5) from the dividend after 74, then repeat: 745 / 640

On to step 3:
The number 640 fits into 745 1 times, leaving a remainder of 105.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 640 from 745 and we're left with 105.
Include the next digit (8) from the dividend after 105, then repeat: 1058 / 640

Advancing to step 4:
The number 640 fits into 1058 1 times, leaving a remainder of 418.
The next digit of our result is 1. 
Result so far: 11.0
Deduct 640 from 1058 and we're left with 418.
Include the next digit (5) from the dividend after 418, then repeat: 4185 / 640

Let's proceed to step 5:
640 can be fit into 4185 6 times, resulting in a remainder of 345.
Write down 6 as next digit of the result. 
Result so far: 116.0
The remainder is 345 after subtracting 3840 from 4185.
Bring next digit (6) of the dividend behind the 345 and repeat the process: 3456 / 640

On to step 6:
3456 divided by 640 is 5 with a remainder of 256.
Record the quotient 5 as the next digit in the result. 
Result so far: 1165.0
If we subtract 3200 from 3456, we get 256.
Append the next digit (2) from the dividend to 256 and continue with: 2562 / 640

Step 7:
When dividing 2562 by 640, we get 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 11654.0
If we take 2560 away from 2562, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 640

Moving on to step 8:
640 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 116540.0
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 9:
The number 640 fits into 200 0 times, leaving a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 116540.0
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 10:
640 goes into 2000 3 times with a remainder of 80.
The next digit of our result is 3. 
Result so far: 116540.03
Deduct 1920 from 2000 and we're left 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 11:
The number 640 fits into 800 1 times, leaving a remainder of 160.
The next digit of our result is 1. 
Result so far: 116540.031
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.

Moving on to step 12:
640 can be fit into 1600 2 times, resulting in a remainder of 320.
Put 2 as the next digit of the answer. 
Result so far: 116540.0312
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.

Let's proceed to step 13:
The number 640 fits into 3200 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 116540.03125
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 14:
0 divided by 640 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 116540.03125
Deduct 0 from 0 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.

Going ahead to step 15:
If we divide 0 by 640, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 116540.03125
Subtracting 0 from 0 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.

The final outcome is 116540.03125, with a leftover of 0.0.