We look at the division of 42454710 by 640 
We want to figure out the number of times 42454710 can be divided by 640.

On to step 1:
The number 640 fits into 4 0 times, leaving a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 640

Step 2:
640 goes into 42 0 times with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 640

Let's proceed to step 3:
When dividing 424 by 640, we get 0 with a remainder of 424.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 424, we get 424.
Bring next digit (5) of the dividend behind the 424 and repeat the process: 4245 / 640

Going ahead to step 4:
640 can be fit into 4245 6 times, resulting in a remainder of 405.
Put 6 as the next digit of the answer. 
Result so far: 6.0
If we subtract 3840 from 4245, we get 405.
Fetch the next digit (4) from the dividend, attach it to 405 and continue: 4054 / 640

On to step 5:
640 can be fit into 4054 6 times, resulting in a remainder of 214.
The number 6 becomes the next digit in our result. 
Result so far: 66.0
If we take 3840 away from 4054, we end up with 214.
Bring next digit (7) of the dividend behind the 214 and repeat the process: 2147 / 640

Step 6:
640 goes into 2147 3 times with a remainder of 227.
Put 3 as the next digit of the answer. 
Result so far: 663.0
Deduct 1920 from 2147 and we're left with 227.
Append the next digit (1) from the dividend to 227 and continue with: 2271 / 640

Step 7:
The number 640 fits into 2271 3 times, leaving a remainder of 351.
The number 3 becomes the next digit in our result. 
Result so far: 6633.0
If we take 1920 away from 2271, we end up with 351.
Include the next digit (0) from the dividend after 351, then repeat: 3510 / 640

Let's proceed to step 8:
The number 640 fits into 3510 5 times, leaving a remainder of 310.
Put 5 as the next digit of the answer. 
Result so far: 66335.0
If we subtract 3200 from 3510, we get 310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

Going ahead to step 9:
The number 640 fits into 3100 4 times, leaving a remainder of 540.
Use 4 as the next digit of our solution. 
Result so far: 66335.4
Deduct 2560 from 3100 and we're left with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Step 10:
When dividing 5400 by 640, we get 8 with a remainder of 280.
The next digit of our result is 8. 
Result so far: 66335.48
If we take 5120 away from 5400, we end up with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Let's proceed to step 11:
When dividing 2800 by 640, we get 4 with a remainder of 240.
Write down 4 as next digit of the result. 
Result so far: 66335.484
Deduct 2560 from 2800 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 12:
When dividing 2400 by 640, we get 3 with a remainder of 480.
Record the quotient 3 as the next digit in the result. 
Result so far: 66335.4843
Subtracting 1920 from 2400 leaves us with 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4800, and continue the process.

On to step 13:
640 goes into 4800 7 times with a remainder of 320.
The number 7 becomes the next digit in our result. 
Result so far: 66335.48437
Deduct 4480 from 4800 and we're left 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.

Let's proceed to step 14:
The number 640 fits into 3200 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 66335.484375
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.

Step 15:
640 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 66335.484375
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.

Going ahead to step 16:
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: 66335.484375
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.

After the division, we end up with 66335.484375 and a remainder of 0.0.