406874 ÷ 42 
We want to divide 406874 by 42.

On to step 1:
42 can be fit into 4 0 times, resulting in a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 42

On to step 2:
42 can be fit into 40 0 times, resulting in a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Include the next digit (6) from the dividend after 40, then repeat: 406 / 42

Moving on to step 3:
The number 42 fits into 406 9 times, leaving a remainder of 28.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Deduct 378 from 406 and we're left with 28.
Grab the next digit (8) from the dividend, add it to 28, then carry on: 288 / 42

Going ahead to step 4:
If we divide 288 by 42, we get 6 and a remainder of 36.
Put 6 as the next digit of the answer. 
Result so far: 96.0
Subtract 252 from 288 to get 36.
Fetch the next digit (7) from the dividend, attach it to 36 and continue: 367 / 42

Moving on to step 5:
When dividing 367 by 42, we get 8 with a remainder of 31.
The next digit of our result is 8. 
Result so far: 968.0
The remainder is 31 after subtracting 336 from 367.
Grab the next digit (4) from the dividend, add it to 31, then carry on: 314 / 42

Advancing to step 6:
The number 42 fits into 314 7 times, leaving a remainder of 20.
Put 7 as the next digit of the answer. 
Result so far: 9687.0
Subtracting 294 from 314 leaves us with 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 7:
42 can be fit into 200 4 times, resulting in a remainder of 32.
Use 4 as the next digit of our solution. 
Result so far: 9687.4
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.

Going ahead to step 8:
42 can be fit into 320 7 times, resulting in a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 9687.47
If we subtract 294 from 320, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 9:
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: 9687.476
The remainder is 8 after subtracting 252 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 10:
When dividing 80 by 42, we get 1 with a remainder of 38.
The next digit of our result is 1. 
Result so far: 9687.4761
Subtract 42 from 80 to get 38.
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 11:
The number 42 fits into 380 9 times, leaving a remainder of 2.
Write down 9 as next digit of the result. 
Result so far: 9687.47619
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.

Advancing to step 12:
The number 42 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9687.47619
If we subtract 0 from 20, we 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.

On to step 13:
42 can be fit into 200 4 times, resulting in a remainder of 32.
The next digit of our result is 4. 
Result so far: 9687.4761904
Subtracting 168 from 200 leaves us 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.

Step 14:
When dividing 320 by 42, we get 7 with a remainder of 26.
Use 7 as the next digit of our solution. 
Result so far: 9687.47619047
Deduct 294 from 320 and we're left 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.

The final outcome is 9687.47619047, with a leftover of 2.6e-08.