391805 ÷ 42 
Let's see how many times 42 fits into 391805.

Advancing to step 1:
When dividing 3 by 42, we get 0 with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Bring next digit (9) of the dividend behind the 3 and repeat the process: 39 / 42

Moving on to step 2:
If we divide 39 by 42, we get 0 and a remainder of 39.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 39, we get 39.
Take the next digit (1) from the dividend and append it to 39, then repeat: 391 / 42

Going ahead to step 3:
391 divided by 42 is 9 with a remainder of 13.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 378 from 391 and we're left with 13.
Append the next digit (8) from the dividend to 13 and continue with: 138 / 42

Going ahead to step 4:
138 divided by 42 is 3 with a remainder of 12.
The number 3 becomes the next digit in our result. 
Result so far: 93.0
Subtracting 126 from 138 leaves us with 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 42

Step 5:
42 goes into 120 2 times with a remainder of 36.
Write down 2 as next digit of the result. 
Result so far: 932.0
Subtract 84 from 120 to get 36.
Fetch the next digit (5) from the dividend, attach it to 36 and continue: 365 / 42

Going ahead to step 6:
When dividing 365 by 42, we get 8 with a remainder of 29.
Record the quotient 8 as the next digit in the result. 
Result so far: 9328.0
Subtracting 336 from 365 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Advancing to step 7:
42 can be fit into 290 6 times, resulting in a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 9328.6
The remainder is 38 after subtracting 252 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 8:
When dividing 380 by 42, we get 9 with a remainder of 2.
The next digit of our result is 9. 
Result so far: 9328.69
If we take 378 away from 380, we end up 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.

Advancing to step 9:
20 divided by 42 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 9328.69
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.

Step 10:
If we divide 200 by 42, we get 4 and a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 9328.6904
The remainder is 32 after subtracting 168 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 11:
42 can be fit into 320 7 times, resulting in a remainder of 26.
The next digit of our result is 7. 
Result so far: 9328.69047
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.

Step 12:
260 divided by 42 is 6 with a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 9328.690476
If we subtract 252 from 260, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 13:
80 divided by 42 is 1 with a remainder of 38.
The next digit of our result is 1. 
Result so far: 9328.6904761
The remainder is 38 after subtracting 42 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Moving on to step 14:
380 divided by 42 is 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 9328.69047619
Subtracting 378 from 380 leaves us 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.

The quotient of the division is 9328.69047619, and the remainder is 2e-09.