Let's divide 42152221 by 641
We're looking to find how many times 641 goes into 42152221.

Step 1:
641 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 641

Step 2:
641 goes into 42 0 times with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 641

Advancing to step 3:
641 can be fit into 421 0 times, resulting in a remainder of 421.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 421 after subtracting 0 from 421.
Bring next digit (5) of the dividend behind the 421 and repeat the process: 4215 / 641

Step 4:
641 can be fit into 4215 6 times, resulting in a remainder of 369.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtract 3846 from 4215 to get 369.
Append the next digit (2) from the dividend to 369 and continue with: 3692 / 641

Advancing to step 5:
When dividing 3692 by 641, we get 5 with a remainder of 487.
Record the quotient 5 as the next digit in the result. 
Result so far: 65.0
The remainder is 487 after subtracting 3205 from 3692.
Append the next digit (2) from the dividend to 487 and continue with: 4872 / 641

Let's proceed to step 6:
4872 divided by 641 is 7 with a remainder of 385.
The next digit of our result is 7. 
Result so far: 657.0
Deduct 4487 from 4872 and we're left with 385.
Include the next digit (2) from the dividend after 385, then repeat: 3852 / 641

Going ahead to step 7:
3852 divided by 641 is 6 with a remainder of 6.
Write down 6 as next digit of the result. 
Result so far: 6576.0
Subtracting 3846 from 3852 leaves us with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 641

Step 8:
When dividing 61 by 641, we get 0 with a remainder of 61.
Use 0 as the next digit of our solution. 
Result so far: 65760.0
If we subtract 0 from 61, we get 61.
Since there are no more digits in the dividend, we add a zero to the remainder making it 610, and continue the process.

Going ahead to step 9:
The number 641 fits into 610 0 times, leaving a remainder of 610.
The number 0 becomes the next digit in our result. 
Result so far: 65760.0
The remainder is 610 after subtracting 0 from 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

On to step 10:
641 can be fit into 6100 9 times, resulting in a remainder of 331.
Record the quotient 9 as the next digit in the result. 
Result so far: 65760.09
If we subtract 5769 from 6100, we get 331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3310, and continue the process.

On to step 11:
3310 divided by 641 is 5 with a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 65760.095
If we take 3205 away from 3310, we end up with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Moving on to step 12:
When dividing 1050 by 641, we get 1 with a remainder of 409.
Put 1 as the next digit of the answer. 
Result so far: 65760.0951
Subtracting 641 from 1050 leaves us with 409.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4090, and continue the process.

Let's proceed to step 13:
641 can be fit into 4090 6 times, resulting in a remainder of 244.
Use 6 as the next digit of our solution. 
Result so far: 65760.09516
Subtract 3846 from 4090 to get 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

On to step 14:
641 goes into 2440 3 times with a remainder of 517.
The number 3 becomes the next digit in our result. 
Result so far: 65760.095163
The remainder is 517 after subtracting 1923 from 2440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5170, and continue the process.

Step 15:
If we divide 5170 by 641, we get 8 and a remainder of 42.
Put 8 as the next digit of the answer. 
Result so far: 65760.0951638
The remainder is 42 after subtracting 5128 from 5170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 16:
When dividing 420 by 641, we get 0 with a remainder of 420.
Write down 0 as next digit of the result. 
Result so far: 65760.0951638
If we subtract 0 from 420, we get 420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4200, and continue the process.

The final outcome is 65760.0951638, with a leftover of 4.2e-07.