We're dividing 42025254 by 521 
We're looking to find how many times 521 goes into 42025254.

Moving on to step 1:
The number 521 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 521

On to step 2:
42 divided by 521 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 521

Let's proceed to step 3:
If we divide 420 by 521, we get 0 and a remainder of 420.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 420 and we're left with 420.
Grab the next digit (2) from the dividend, add it to 420, then carry on: 4202 / 521

Going ahead to step 4:
If we divide 4202 by 521, we get 8 and a remainder of 34.
Put 8 as the next digit of the answer. 
Result so far: 8.0
The remainder is 34 after subtracting 4168 from 4202.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 521

Step 5:
345 divided by 521 is 0 with a remainder of 345.
Write down 0 as next digit of the result. 
Result so far: 80.0
The remainder is 345 after subtracting 0 from 345.
Grab the next digit (2) from the dividend, add it to 345, then carry on: 3452 / 521

Step 6:
521 can be fit into 3452 6 times, resulting in a remainder of 326.
Write down 6 as next digit of the result. 
Result so far: 806.0
The remainder is 326 after subtracting 3126 from 3452.
Append the next digit (5) from the dividend to 326 and continue with: 3265 / 521

Going ahead to step 7:
3265 divided by 521 is 6 with a remainder of 139.
Record the quotient 6 as the next digit in the result. 
Result so far: 8066.0
The remainder is 139 after subtracting 3126 from 3265.
Fetch the next digit (4) from the dividend, attach it to 139 and continue: 1394 / 521

Step 8:
521 goes into 1394 2 times with a remainder of 352.
Write down 2 as next digit of the result. 
Result so far: 80662.0
If we take 1042 away from 1394, we end up with 352.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

Let's proceed to step 9:
3520 divided by 521 is 6 with a remainder of 394.
The number 6 becomes the next digit in our result. 
Result so far: 80662.6
If we subtract 3126 from 3520, we get 394.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3940, and continue the process.

On to step 10:
521 can be fit into 3940 7 times, resulting in a remainder of 293.
Put 7 as the next digit of the answer. 
Result so far: 80662.67
Deduct 3647 from 3940 and we're left with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Moving on to step 11:
2930 divided by 521 is 5 with a remainder of 325.
The number 5 becomes the next digit in our result. 
Result so far: 80662.675
Subtract 2605 from 2930 to get 325.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

On to step 12:
521 goes into 3250 6 times with a remainder of 124.
Put 6 as the next digit of the answer. 
Result so far: 80662.6756
If we subtract 3126 from 3250, we get 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Moving on to step 13:
521 can be fit into 1240 2 times, resulting in a remainder of 198.
The next digit of our result is 2. 
Result so far: 80662.67562
Subtract 1042 from 1240 to get 198.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1980, and continue the process.

Step 14:
1980 divided by 521 is 3 with a remainder of 417.
The number 3 becomes the next digit in our result. 
Result so far: 80662.675623
If we subtract 1563 from 1980, we get 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

Let's proceed to step 15:
521 goes into 4170 8 times with a remainder of 2.
The next digit of our result is 8. 
Result so far: 80662.6756238
The remainder is 2 after subtracting 4168 from 4170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 16:
If we divide 20 by 521, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 80662.6756238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 80662.6756238 with a remaining 2e-08.