We're dividing 4210234 by 125 
We want to figure out the number of times 4210234 can be divided by 125.

On to step 1:
When dividing 4 by 125, we get 0 with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Grab the next digit (2) from the dividend, add it to 4, then carry on: 42 / 125

Going ahead to step 2:
The number 125 fits into 42 0 times, leaving a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Fetch the next digit (1) from the dividend, attach it to 42 and continue: 421 / 125

Step 3:
421 divided by 125 is 3 with a remainder of 46.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
The remainder is 46 after subtracting 375 from 421.
Take the next digit (0) from the dividend and append it to 46, then repeat: 460 / 125

On to step 4:
460 divided by 125 is 3 with a remainder of 85.
The number 3 becomes the next digit in our result. 
Result so far: 33.0
Subtract 375 from 460 to get 85.
Include the next digit (2) from the dividend after 85, then repeat: 852 / 125

On to step 5:
The number 125 fits into 852 6 times, leaving a remainder of 102.
The next digit of our result is 6. 
Result so far: 336.0
If we take 750 away from 852, we end up with 102.
Grab the next digit (3) from the dividend, add it to 102, then carry on: 1023 / 125

Step 6:
1023 divided by 125 is 8 with a remainder of 23.
Write down 8 as next digit of the result. 
Result so far: 3368.0
Subtracting 1000 from 1023 leaves us with 23.
Take the next digit (4) from the dividend and append it to 23, then repeat: 234 / 125

Advancing to step 7:
234 divided by 125 is 1 with a remainder of 109.
Use 1 as the next digit of our solution. 
Result so far: 33681.0
If we take 125 away from 234, we end up with 109.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1090, and continue the process.

On to step 8:
When dividing 1090 by 125, we get 8 with a remainder of 90.
Write down 8 as next digit of the result. 
Result so far: 33681.8
If we take 1000 away from 1090, we end up with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Moving on to step 9:
If we divide 900 by 125, we get 7 and a remainder of 25.
The next digit of our result is 7. 
Result so far: 33681.87
The remainder is 25 after subtracting 875 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 10:
125 can be fit into 250 2 times, resulting in a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 33681.872
If we subtract 250 from 250, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 11:
When dividing 0 by 125, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 33681.872
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 12:
If we divide 0 by 125, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 33681.872
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 33681.872 and a remainder of 0.0.