20696378 ÷ 451 
Let's see how many times 451 fits into 20696378.

Going ahead to step 1:
451 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 451

Going ahead to step 2:
When dividing 20 by 451, we get 0 with 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.
Append the next digit (6) from the dividend to 20 and continue with: 206 / 451

Step 3:
451 goes into 206 0 times with a remainder of 206.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 206, we end up with 206.
Grab the next digit (9) from the dividend, add it to 206, then carry on: 2069 / 451

Let's proceed to step 4:
451 can be fit into 2069 4 times, resulting in a remainder of 265.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 1804 from 2069 leaves us with 265.
Include the next digit (6) from the dividend after 265, then repeat: 2656 / 451

Going ahead to step 5:
451 can be fit into 2656 5 times, resulting in a remainder of 401.
Put 5 as the next digit of the answer. 
Result so far: 45.0
If we subtract 2255 from 2656, we get 401.
Append the next digit (3) from the dividend to 401 and continue with: 4013 / 451

Let's proceed to step 6:
451 goes into 4013 8 times with a remainder of 405.
The number 8 becomes the next digit in our result. 
Result so far: 458.0
If we subtract 3608 from 4013, we get 405.
Grab the next digit (7) from the dividend, add it to 405, then carry on: 4057 / 451

Going ahead to step 7:
When dividing 4057 by 451, we get 8 with a remainder of 449.
The next digit of our result is 8. 
Result so far: 4588.0
Subtract 3608 from 4057 to get 449.
Fetch the next digit (8) from the dividend, attach it to 449 and continue: 4498 / 451

On to step 8:
451 can be fit into 4498 9 times, resulting in a remainder of 439.
Use 9 as the next digit of our solution. 
Result so far: 45889.0
Subtract 4059 from 4498 to get 439.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4390, and continue the process.

Let's proceed to step 9:
4390 divided by 451 is 9 with a remainder of 331.
Put 9 as the next digit of the answer. 
Result so far: 45889.9
If we subtract 4059 from 4390, 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.

Let's proceed to step 10:
When dividing 3310 by 451, we get 7 with a remainder of 153.
Use 7 as the next digit of our solution. 
Result so far: 45889.97
The remainder is 153 after subtracting 3157 from 3310.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1530, and continue the process.

Let's proceed to step 11:
If we divide 1530 by 451, we get 3 and a remainder of 177.
The number 3 becomes the next digit in our result. 
Result so far: 45889.973
If we take 1353 away from 1530, we end up with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Advancing to step 12:
451 can be fit into 1770 3 times, resulting in a remainder of 417.
The next digit of our result is 3. 
Result so far: 45889.9733
The remainder is 417 after subtracting 1353 from 1770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

The final outcome is 45889.9733, with a leftover of 0.00417.