We look at the division of 20487254 by 451 
We want to divide 20487254 by 451.

Step 1:
2 divided by 451 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 451

Let's proceed to step 2:
If we divide 20 by 451, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 20 leaves us with 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 451

On to step 3:
If we divide 204 by 451, we get 0 and a remainder of 204.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 204 to get 204.
Grab the next digit (8) from the dividend, add it to 204, then carry on: 2048 / 451

Going ahead to step 4:
2048 divided by 451 is 4 with a remainder of 244.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
The remainder is 244 after subtracting 1804 from 2048.
Fetch the next digit (7) from the dividend, attach it to 244 and continue: 2447 / 451

Let's proceed to step 5:
If we divide 2447 by 451, we get 5 and a remainder of 192.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
If we take 2255 away from 2447, we end up with 192.
Append the next digit (2) from the dividend to 192 and continue with: 1922 / 451

On to step 6:
When dividing 1922 by 451, we get 4 with a remainder of 118.
Put 4 as the next digit of the answer. 
Result so far: 454.0
The remainder is 118 after subtracting 1804 from 1922.
Grab the next digit (5) from the dividend, add it to 118, then carry on: 1185 / 451

On to step 7:
When dividing 1185 by 451, we get 2 with a remainder of 283.
Record the quotient 2 as the next digit in the result. 
Result so far: 4542.0
Deduct 902 from 1185 and we're left with 283.
Take the next digit (4) from the dividend and append it to 283, then repeat: 2834 / 451

Moving on to step 8:
451 goes into 2834 6 times with a remainder of 128.
Put 6 as the next digit of the answer. 
Result so far: 45426.0
Deduct 2706 from 2834 and we're left with 128.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1280, and continue the process.

Step 9:
451 can be fit into 1280 2 times, resulting in a remainder of 378.
The number 2 becomes the next digit in our result. 
Result so far: 45426.2
Subtracting 902 from 1280 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

On to step 10:
3780 divided by 451 is 8 with a remainder of 172.
Record the quotient 8 as the next digit in the result. 
Result so far: 45426.28
Subtract 3608 from 3780 to get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 11:
The number 451 fits into 1720 3 times, leaving a remainder of 367.
Record the quotient 3 as the next digit in the result. 
Result so far: 45426.283
Subtract 1353 from 1720 to get 367.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

Step 12:
3670 divided by 451 is 8 with a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 45426.2838
Subtracting 3608 from 3670 leaves us with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Step 13:
If we divide 620 by 451, we get 1 and a remainder of 169.
The number 1 becomes the next digit in our result. 
Result so far: 45426.28381
Subtracting 451 from 620 leaves us with 169.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1690, and continue the process.

Let's proceed to step 14:
451 can be fit into 1690 3 times, resulting in a remainder of 337.
Put 3 as the next digit of the answer. 
Result so far: 45426.283813
If we subtract 1353 from 1690, we get 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Advancing to step 15:
When dividing 3370 by 451, we get 7 with a remainder of 213.
Put 7 as the next digit of the answer. 
Result so far: 45426.2838137
Deduct 3157 from 3370 and we're left with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

Going ahead to step 16:
When dividing 2130 by 451, we get 4 with a remainder of 326.
Record the quotient 4 as the next digit in the result. 
Result so far: 45426.28381374
If we take 1804 away from 2130, we end up with 326.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3260, and continue the process.

In conclusion, the division gives 45426.28381374 with a balance of 3.26e-07.