We're dividing 42939430 by 830 
We want to divide 42939430 by 830.

Advancing to step 1:
When dividing 4 by 830, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 830

On to step 2:
42 divided by 830 is 0 with a remainder of 42.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 42 leaves us with 42.
Bring next digit (9) of the dividend behind the 42 and repeat the process: 429 / 830

Advancing to step 3:
The number 830 fits into 429 0 times, leaving a remainder of 429.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 429 and we're left with 429.
Take the next digit (3) from the dividend and append it to 429, then repeat: 4293 / 830

Going ahead to step 4:
830 goes into 4293 5 times with a remainder of 143.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 4150 from 4293 to get 143.
Bring next digit (9) of the dividend behind the 143 and repeat the process: 1439 / 830

Advancing to step 5:
830 goes into 1439 1 times with a remainder of 609.
The number 1 becomes the next digit in our result. 
Result so far: 51.0
Deduct 830 from 1439 and we're left with 609.
Append the next digit (4) from the dividend to 609 and continue with: 6094 / 830

Moving on to step 6:
830 goes into 6094 7 times with a remainder of 284.
The number 7 becomes the next digit in our result. 
Result so far: 517.0
Subtracting 5810 from 6094 leaves us with 284.
Take the next digit (3) from the dividend and append it to 284, then repeat: 2843 / 830

Let's proceed to step 7:
When dividing 2843 by 830, we get 3 with a remainder of 353.
Put 3 as the next digit of the answer. 
Result so far: 5173.0
If we take 2490 away from 2843, we end up with 353.
Take the next digit (0) from the dividend and append it to 353, then repeat: 3530 / 830

Let's proceed to step 8:
830 goes into 3530 4 times with a remainder of 210.
Use 4 as the next digit of our solution. 
Result so far: 51734.0
Deduct 3320 from 3530 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Step 9:
830 can be fit into 2100 2 times, resulting in a remainder of 440.
Write down 2 as next digit of the result. 
Result so far: 51734.2
Subtract 1660 from 2100 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 10:
830 can be fit into 4400 5 times, resulting in a remainder of 250.
Put 5 as the next digit of the answer. 
Result so far: 51734.25
Subtract 4150 from 4400 to get 250.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2500, and continue the process.

On to step 11:
830 can be fit into 2500 3 times, resulting in a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 51734.253
The remainder is 10 after subtracting 2490 from 2500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 12:
830 can be fit into 100 0 times, resulting in a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 51734.253
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Let's proceed to step 13:
830 can be fit into 1000 1 times, resulting in a remainder of 170.
Use 1 as the next digit of our solution. 
Result so far: 51734.25301
Deduct 830 from 1000 and we're left with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Step 14:
The number 830 fits into 1700 2 times, leaving a remainder of 40.
The number 2 becomes the next digit in our result. 
Result so far: 51734.253012
The remainder is 40 after subtracting 1660 from 1700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 15:
The number 830 fits into 400 0 times, leaving a remainder of 400.
Record the quotient 0 as the next digit in the result. 
Result so far: 51734.253012
Deduct 0 from 400 and we're left with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Step 16:
When dividing 4000 by 830, we get 4 with a remainder of 680.
Write down 4 as next digit of the result. 
Result so far: 51734.25301204
If we take 3320 away from 4000, we end up with 680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6800, and continue the process.

The final result is 51734.25301204 with a remainder of 6.8e-07.