42562172 divided by 645 
Our goal is to divide 42562172 by 645.

On to step 1:
645 can be fit into 4 0 times, resulting in a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 645

Going ahead to step 2:
42 divided by 645 is 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 645

On to step 3:
When dividing 425 by 645, we get 0 with a remainder of 425.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 425 leaves us with 425.
Fetch the next digit (6) from the dividend, attach it to 425 and continue: 4256 / 645

Advancing to step 4:
The number 645 fits into 4256 6 times, leaving a remainder of 386.
The next digit of our result is 6. 
Result so far: 6.0
If we take 3870 away from 4256, we end up with 386.
Append the next digit (2) from the dividend to 386 and continue with: 3862 / 645

Advancing to step 5:
If we divide 3862 by 645, we get 5 and a remainder of 637.
The next digit of our result is 5. 
Result so far: 65.0
Subtract 3225 from 3862 to get 637.
Grab the next digit (1) from the dividend, add it to 637, then carry on: 6371 / 645

Going ahead to step 6:
When dividing 6371 by 645, we get 9 with a remainder of 566.
The number 9 becomes the next digit in our result. 
Result so far: 659.0
The remainder is 566 after subtracting 5805 from 6371.
Fetch the next digit (7) from the dividend, attach it to 566 and continue: 5667 / 645

Let's proceed to step 7:
645 goes into 5667 8 times with a remainder of 507.
Write down 8 as next digit of the result. 
Result so far: 6598.0
Subtract 5160 from 5667 to get 507.
Take the next digit (2) from the dividend and append it to 507, then repeat: 5072 / 645

Moving on to step 8:
If we divide 5072 by 645, we get 7 and a remainder of 557.
The next digit of our result is 7. 
Result so far: 65987.0
If we take 4515 away from 5072, we end up with 557.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5570, and continue the process.

Moving on to step 9:
If we divide 5570 by 645, we get 8 and a remainder of 410.
Write down 8 as next digit of the result. 
Result so far: 65987.8
If we take 5160 away from 5570, we end up with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Moving on to step 10:
If we divide 4100 by 645, we get 6 and a remainder of 230.
Use 6 as the next digit of our solution. 
Result so far: 65987.86
Subtract 3870 from 4100 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 11:
The number 645 fits into 2300 3 times, leaving a remainder of 365.
Put 3 as the next digit of the answer. 
Result so far: 65987.863
Deduct 1935 from 2300 and we're left with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

Let's proceed to step 12:
The number 645 fits into 3650 5 times, leaving a remainder of 425.
Write down 5 as next digit of the result. 
Result so far: 65987.8635
If we subtract 3225 from 3650, we get 425.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4250, and continue the process.

Moving on to step 13:
645 goes into 4250 6 times with a remainder of 380.
Record the quotient 6 as the next digit in the result. 
Result so far: 65987.86356
If we subtract 3870 from 4250, we get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

On to step 14:
3800 divided by 645 is 5 with a remainder of 575.
Record the quotient 5 as the next digit in the result. 
Result so far: 65987.863565
If we subtract 3225 from 3800, we get 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Let's proceed to step 15:
645 goes into 5750 8 times with a remainder of 590.
Write down 8 as next digit of the result. 
Result so far: 65987.8635658
Subtract 5160 from 5750 to get 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5900, and continue the process.

On to step 16:
645 can be fit into 5900 9 times, resulting in a remainder of 95.
The number 9 becomes the next digit in our result. 
Result so far: 65987.86356589
Subtract 5805 from 5900 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

After the division, we end up with 65987.86356589 and a remainder of 9.5e-08.