19957025 ÷ 398 
Our goal is to divide 19957025 by 398.

Going ahead to step 1:
398 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 398

Going ahead to step 2:
19 divided by 398 is 0 with a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 19, we end up with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 398

Going ahead to step 3:
199 divided by 398 is 0 with a remainder of 199.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 199 after subtracting 0 from 199.
Include the next digit (5) from the dividend after 199, then repeat: 1995 / 398

On to step 4:
If we divide 1995 by 398, we get 5 and a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 1990 away from 1995, we end up with 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 398

Step 5:
The number 398 fits into 57 0 times, leaving a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 50.0
The remainder is 57 after subtracting 0 from 57.
Grab the next digit (0) from the dividend, add it to 57, then carry on: 570 / 398

Step 6:
If we divide 570 by 398, we get 1 and a remainder of 172.
The number 1 becomes the next digit in our result. 
Result so far: 501.0
Subtract 398 from 570 to get 172.
Include the next digit (2) from the dividend after 172, then repeat: 1722 / 398

Moving on to step 7:
398 can be fit into 1722 4 times, resulting in a remainder of 130.
The next digit of our result is 4. 
Result so far: 5014.0
Subtract 1592 from 1722 to get 130.
Append the next digit (5) from the dividend to 130 and continue with: 1305 / 398

Advancing to step 8:
1305 divided by 398 is 3 with a remainder of 111.
Record the quotient 3 as the next digit in the result. 
Result so far: 50143.0
Subtracting 1194 from 1305 leaves us with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Moving on to step 9:
When dividing 1110 by 398, we get 2 with a remainder of 314.
Put 2 as the next digit of the answer. 
Result so far: 50143.2
Deduct 796 from 1110 and we're left with 314.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3140, and continue the process.

Moving on to step 10:
398 can be fit into 3140 7 times, resulting in a remainder of 354.
The number 7 becomes the next digit in our result. 
Result so far: 50143.27
If we subtract 2786 from 3140, we get 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Advancing to step 11:
398 goes into 3540 8 times with a remainder of 356.
Put 8 as the next digit of the answer. 
Result so far: 50143.278
If we take 3184 away from 3540, we end up with 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Step 12:
398 goes into 3560 8 times with a remainder of 376.
Record the quotient 8 as the next digit in the result. 
Result so far: 50143.2788
If we subtract 3184 from 3560, we get 376.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3760, and continue the process.

The final outcome is 50143.2788, with a leftover of 0.00376.