19801254 ÷ 434 
We want to figure out the number of times 19801254 can be divided by 434.

Going ahead to step 1:
If we divide 1 by 434, we get 0 and a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 434

Moving on to step 2:
434 goes into 19 0 times with a remainder of 19.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Fetch the next digit (8) from the dividend, attach it to 19 and continue: 198 / 434

Let's proceed to step 3:
434 goes into 198 0 times with a remainder of 198.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 198 to get 198.
Take the next digit (0) from the dividend and append it to 198, then repeat: 1980 / 434

On to step 4:
If we divide 1980 by 434, we get 4 and a remainder of 244.
The next digit of our result is 4. 
Result so far: 4.0
Subtract 1736 from 1980 to get 244.
Include the next digit (1) from the dividend after 244, then repeat: 2441 / 434

Let's proceed to step 5:
434 goes into 2441 5 times with a remainder of 271.
Put 5 as the next digit of the answer. 
Result so far: 45.0
If we take 2170 away from 2441, we end up with 271.
Include the next digit (2) from the dividend after 271, then repeat: 2712 / 434

Going ahead to step 6:
434 can be fit into 2712 6 times, resulting in a remainder of 108.
Write down 6 as next digit of the result. 
Result so far: 456.0
If we subtract 2604 from 2712, we get 108.
Fetch the next digit (5) from the dividend, attach it to 108 and continue: 1085 / 434

On to step 7:
1085 divided by 434 is 2 with a remainder of 217.
Put 2 as the next digit of the answer. 
Result so far: 4562.0
Deduct 868 from 1085 and we're left with 217.
Append the next digit (4) from the dividend to 217 and continue with: 2174 / 434

Step 8:
434 goes into 2174 5 times with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 45625.0
Deduct 2170 from 2174 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 9:
434 goes into 40 0 times with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 45625.0
Subtracting 0 from 40 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Step 10:
If we divide 400 by 434, we get 0 and a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 45625.0
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 45625.0, with a leftover of 0.4.