We look at the division of 42917234 by 421 
We're looking to find how many times 421 goes into 42917234.

Moving on to step 1:
4 divided by 421 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 421

Let's proceed to step 2:
When dividing 42 by 421, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 42 to get 42.
Include the next digit (9) from the dividend after 42, then repeat: 429 / 421

Moving on to step 3:
421 goes into 429 1 times with a remainder of 8.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 421 from 429 leaves us with 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 421

Going ahead to step 4:
When dividing 81 by 421, we get 0 with a remainder of 81.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we take 0 away from 81, we end up with 81.
Include the next digit (7) from the dividend after 81, then repeat: 817 / 421

Moving on to step 5:
If we divide 817 by 421, we get 1 and a remainder of 396.
The number 1 becomes the next digit in our result. 
Result so far: 101.0
Subtracting 421 from 817 leaves us with 396.
Include the next digit (2) from the dividend after 396, then repeat: 3962 / 421

Let's proceed to step 6:
421 can be fit into 3962 9 times, resulting in a remainder of 173.
The next digit of our result is 9. 
Result so far: 1019.0
If we take 3789 away from 3962, we end up with 173.
Grab the next digit (3) from the dividend, add it to 173, then carry on: 1733 / 421

Moving on to step 7:
When dividing 1733 by 421, we get 4 with a remainder of 49.
Use 4 as the next digit of our solution. 
Result so far: 10194.0
The remainder is 49 after subtracting 1684 from 1733.
Fetch the next digit (4) from the dividend, attach it to 49 and continue: 494 / 421

On to step 8:
494 divided by 421 is 1 with a remainder of 73.
Use 1 as the next digit of our solution. 
Result so far: 101941.0
Subtracting 421 from 494 leaves us with 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Advancing to step 9:
730 divided by 421 is 1 with a remainder of 309.
Put 1 as the next digit of the answer. 
Result so far: 101941.1
If we subtract 421 from 730, we get 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

On to step 10:
421 can be fit into 3090 7 times, resulting in a remainder of 143.
Write down 7 as next digit of the result. 
Result so far: 101941.17
Subtract 2947 from 3090 to get 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

Going ahead to step 11:
If we divide 1430 by 421, we get 3 and a remainder of 167.
Write down 3 as next digit of the result. 
Result so far: 101941.173
Deduct 1263 from 1430 and we're left with 167.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1670, and continue the process.

Step 12:
The number 421 fits into 1670 3 times, leaving a remainder of 407.
Put 3 as the next digit of the answer. 
Result so far: 101941.1733
Subtract 1263 from 1670 to get 407.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

In conclusion, the division gives 101941.1733 with a balance of 0.00407.