We're dividing 42920275 by 391 
We want to figure out the number of times 42920275 can be divided by 391.

On to step 1:
391 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (2) from the dividend after 4, then repeat: 42 / 391

Going ahead to step 2:
When dividing 42 by 391, we get 0 with a remainder of 42.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 42, we end up with 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 391

On to step 3:
429 divided by 391 is 1 with a remainder of 38.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 38 after subtracting 391 from 429.
Take the next digit (2) from the dividend and append it to 38, then repeat: 382 / 391

Advancing to step 4:
If we divide 382 by 391, we get 0 and a remainder of 382.
The next digit of our result is 0. 
Result so far: 10.0
If we take 0 away from 382, we end up with 382.
Take the next digit (0) from the dividend and append it to 382, then repeat: 3820 / 391

Moving on to step 5:
If we divide 3820 by 391, we get 9 and a remainder of 301.
The number 9 becomes the next digit in our result. 
Result so far: 109.0
If we take 3519 away from 3820, we end up with 301.
Include the next digit (2) from the dividend after 301, then repeat: 3012 / 391

Let's proceed to step 6:
The number 391 fits into 3012 7 times, leaving a remainder of 275.
Use 7 as the next digit of our solution. 
Result so far: 1097.0
Subtract 2737 from 3012 to get 275.
Fetch the next digit (7) from the dividend, attach it to 275 and continue: 2757 / 391

Moving on to step 7:
If we divide 2757 by 391, we get 7 and a remainder of 20.
The next digit of our result is 7. 
Result so far: 10977.0
The remainder is 20 after subtracting 2737 from 2757.
Append the next digit (5) from the dividend to 20 and continue with: 205 / 391

Going ahead to step 8:
391 goes into 205 0 times with a remainder of 205.
Record the quotient 0 as the next digit in the result. 
Result so far: 109770.0
If we subtract 0 from 205, we get 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

On to step 9:
2050 divided by 391 is 5 with a remainder of 95.
Record the quotient 5 as the next digit in the result. 
Result so far: 109770.5
Deduct 1955 from 2050 and we're left with 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Step 10:
If we divide 950 by 391, we get 2 and a remainder of 168.
Record the quotient 2 as the next digit in the result. 
Result so far: 109770.52
The remainder is 168 after subtracting 782 from 950.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 11:
1680 divided by 391 is 4 with a remainder of 116.
The next digit of our result is 4. 
Result so far: 109770.524
Subtracting 1564 from 1680 leaves us with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 12:
The number 391 fits into 1160 2 times, leaving a remainder of 378.
The next digit of our result is 2. 
Result so far: 109770.5242
Subtracting 782 from 1160 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

On to step 13:
If we divide 3780 by 391, we get 9 and a remainder of 261.
Use 9 as the next digit of our solution. 
Result so far: 109770.52429
If we subtract 3519 from 3780, we get 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

On to step 14:
391 goes into 2610 6 times with a remainder of 264.
Write down 6 as next digit of the result. 
Result so far: 109770.524296
Deduct 2346 from 2610 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 15:
The number 391 fits into 2640 6 times, leaving a remainder of 294.
The number 6 becomes the next digit in our result. 
Result so far: 109770.5242966
Subtract 2346 from 2640 to get 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

The final outcome is 109770.5242966, with a leftover of 2.94e-06.