Let's divide 857945 by 42
We're looking to find how many times 42 goes into 857945.

Advancing to step 1:
If we divide 8 by 42, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 42

Moving on to step 2:
If we divide 85 by 42, we get 2 and a remainder of 1.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 1 after subtracting 84 from 85.
Bring next digit (7) of the dividend behind the 1 and repeat the process: 17 / 42

Going ahead to step 3:
When dividing 17 by 42, we get 0 with a remainder of 17.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we take 0 away from 17, we end up with 17.
Fetch the next digit (9) from the dividend, attach it to 17 and continue: 179 / 42

On to step 4:
When dividing 179 by 42, we get 4 with a remainder of 11.
The next digit of our result is 4. 
Result so far: 204.0
Subtracting 168 from 179 leaves us with 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 42

On to step 5:
42 goes into 114 2 times with a remainder of 30.
Put 2 as the next digit of the answer. 
Result so far: 2042.0
If we subtract 84 from 114, we get 30.
Take the next digit (5) from the dividend and append it to 30, then repeat: 305 / 42

Moving on to step 6:
305 divided by 42 is 7 with a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 20427.0
If we take 294 away from 305, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
42 goes into 110 2 times with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 20427.2
The remainder is 26 after subtracting 84 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Going ahead to step 8:
The number 42 fits into 260 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 20427.26
Deduct 252 from 260 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 9:
The number 42 fits into 80 1 times, leaving a remainder of 38.
Put 1 as the next digit of the answer. 
Result so far: 20427.261
Subtracting 42 from 80 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
42 can be fit into 380 9 times, resulting in a remainder of 2.
The next digit of our result is 9. 
Result so far: 20427.2619
Deduct 378 from 380 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 11:
The number 42 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 20427.2619
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
200 divided by 42 is 4 with a remainder of 32.
The next digit of our result is 4. 
Result so far: 20427.261904
Deduct 168 from 200 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 13:
320 divided by 42 is 7 with a remainder of 26.
Write down 7 as next digit of the result. 
Result so far: 20427.2619047
If we take 294 away from 320, we end up with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 14:
260 divided by 42 is 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 20427.26190476
If we take 252 away from 260, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 20427.26190476, with a leftover of 8e-09.