42720199 ÷ 398 
We want to figure out the number of times 42720199 can be divided by 398.

Advancing to step 1:
398 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 398

On to step 2:
If we divide 42 by 398, we get 0 and a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Include the next digit (7) from the dividend after 42, then repeat: 427 / 398

Let's proceed to step 3:
427 divided by 398 is 1 with a remainder of 29.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 29 after subtracting 398 from 427.
Fetch the next digit (2) from the dividend, attach it to 29 and continue: 292 / 398

Advancing to step 4:
If we divide 292 by 398, we get 0 and a remainder of 292.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtract 0 from 292 to get 292.
Bring next digit (0) of the dividend behind the 292 and repeat the process: 2920 / 398

Step 5:
If we divide 2920 by 398, we get 7 and a remainder of 134.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
Subtract 2786 from 2920 to get 134.
Fetch the next digit (1) from the dividend, attach it to 134 and continue: 1341 / 398

Moving on to step 6:
If we divide 1341 by 398, we get 3 and a remainder of 147.
Write down 3 as next digit of the result. 
Result so far: 1073.0
If we take 1194 away from 1341, we end up with 147.
Grab the next digit (9) from the dividend, add it to 147, then carry on: 1479 / 398

Step 7:
If we divide 1479 by 398, we get 3 and a remainder of 285.
Write down 3 as next digit of the result. 
Result so far: 10733.0
Subtracting 1194 from 1479 leaves us with 285.
Include the next digit (9) from the dividend after 285, then repeat: 2859 / 398

Let's proceed to step 8:
398 can be fit into 2859 7 times, resulting in a remainder of 73.
Record the quotient 7 as the next digit in the result. 
Result so far: 107337.0
If we subtract 2786 from 2859, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

On to step 9:
If we divide 730 by 398, we get 1 and a remainder of 332.
Write down 1 as next digit of the result. 
Result so far: 107337.1
Subtracting 398 from 730 leaves us with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

Let's proceed to step 10:
If we divide 3320 by 398, we get 8 and a remainder of 136.
Use 8 as the next digit of our solution. 
Result so far: 107337.18
Deduct 3184 from 3320 and we're left with 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 11:
398 can be fit into 1360 3 times, resulting in a remainder of 166.
The next digit of our result is 3. 
Result so far: 107337.183
Deduct 1194 from 1360 and we're left with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

On to step 12:
398 can be fit into 1660 4 times, resulting in a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 107337.1834
The remainder is 68 after subtracting 1592 from 1660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 13:
When dividing 680 by 398, we get 1 with a remainder of 282.
Use 1 as the next digit of our solution. 
Result so far: 107337.18341
If we subtract 398 from 680, we get 282.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2820, and continue the process.

Going ahead to step 14:
2820 divided by 398 is 7 with a remainder of 34.
Use 7 as the next digit of our solution. 
Result so far: 107337.183417
Subtract 2786 from 2820 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Advancing to step 15:
398 can be fit into 340 0 times, resulting in a remainder of 340.
The number 0 becomes the next digit in our result. 
Result so far: 107337.183417
If we subtract 0 from 340, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 16:
398 goes into 3400 8 times with a remainder of 216.
Record the quotient 8 as the next digit in the result. 
Result so far: 107337.18341708
The remainder is 216 after subtracting 3184 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The quotient of the division is 107337.18341708, and the remainder is 2.16e-07.