We divide 42154820 by 398
We want to figure out the number of times 42154820 can be divided by 398.

Advancing to step 1:
398 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 398

Step 2:
42 divided by 398 is 0 with a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Bring next digit (1) of the dividend behind the 42 and repeat the process: 421 / 398

On to step 3:
398 goes into 421 1 times with a remainder of 23.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Deduct 398 from 421 and we're left with 23.
Bring next digit (5) of the dividend behind the 23 and repeat the process: 235 / 398

On to step 4:
235 divided by 398 is 0 with a remainder of 235.
The next digit of our result is 0. 
Result so far: 10.0
Subtract 0 from 235 to get 235.
Bring next digit (4) of the dividend behind the 235 and repeat the process: 2354 / 398

Advancing to step 5:
2354 divided by 398 is 5 with a remainder of 364.
Write down 5 as next digit of the result. 
Result so far: 105.0
Subtract 1990 from 2354 to get 364.
Append the next digit (8) from the dividend to 364 and continue with: 3648 / 398

Advancing to step 6:
If we divide 3648 by 398, we get 9 and a remainder of 66.
Record the quotient 9 as the next digit in the result. 
Result so far: 1059.0
If we subtract 3582 from 3648, we get 66.
Include the next digit (2) from the dividend after 66, then repeat: 662 / 398

Step 7:
398 goes into 662 1 times with a remainder of 264.
Use 1 as the next digit of our solution. 
Result so far: 10591.0
Subtracting 398 from 662 leaves us with 264.
Bring next digit (0) of the dividend behind the 264 and repeat the process: 2640 / 398

Moving on to step 8:
2640 divided by 398 is 6 with a remainder of 252.
The number 6 becomes the next digit in our result. 
Result so far: 105916.0
If we subtract 2388 from 2640, we get 252.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Going ahead to step 9:
2520 divided by 398 is 6 with a remainder of 132.
Record the quotient 6 as the next digit in the result. 
Result so far: 105916.6
The remainder is 132 after subtracting 2388 from 2520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 10:
The number 398 fits into 1320 3 times, leaving a remainder of 126.
The number 3 becomes the next digit in our result. 
Result so far: 105916.63
If we take 1194 away from 1320, we end up with 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Going ahead to step 11:
398 goes into 1260 3 times with a remainder of 66.
Record the quotient 3 as the next digit in the result. 
Result so far: 105916.633
Subtracting 1194 from 1260 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

In conclusion, the division gives 105916.633 with a balance of 0.0066.