861451 ÷ 42 
Let's see how many times 42 fits into 861451.

On to step 1:
8 divided by 42 is 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 42

Going ahead to step 2:
86 divided by 42 is 2 with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 2 after subtracting 84 from 86.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 42

Let's proceed to step 3:
42 goes into 21 0 times with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 20.0
If we subtract 0 from 21, we get 21.
Grab the next digit (4) from the dividend, add it to 21, then carry on: 214 / 42

Moving on to step 4:
When dividing 214 by 42, we get 5 with a remainder of 4.
The next digit of our result is 5. 
Result so far: 205.0
The remainder is 4 after subtracting 210 from 214.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 42

On to step 5:
42 can be fit into 45 1 times, resulting in a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 2051.0
If we subtract 42 from 45, we get 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 42

Advancing to step 6:
When dividing 31 by 42, we get 0 with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 20510.0
If we take 0 away from 31, we end up with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 7:
If we divide 310 by 42, we get 7 and a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 20510.7
Subtract 294 from 310 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 8:
160 divided by 42 is 3 with a remainder of 34.
The next digit of our result is 3. 
Result so far: 20510.73
Subtract 126 from 160 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 9:
42 goes into 340 8 times with a remainder of 4.
The next digit of our result is 8. 
Result so far: 20510.738
If we take 336 away from 340, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 10:
40 divided by 42 is 0 with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 20510.738
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
42 goes into 400 9 times with a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 20510.73809
Subtracting 378 from 400 leaves us with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 12:
42 goes into 220 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 20510.738095
If we subtract 210 from 220, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 13:
The number 42 fits into 100 2 times, leaving a remainder of 16.
Write down 2 as next digit of the result. 
Result so far: 20510.7380952
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
When dividing 160 by 42, we get 3 with a remainder of 34.
Use 3 as the next digit of our solution. 
Result so far: 20510.73809523
The remainder is 34 after subtracting 126 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Our division results in 20510.73809523 with a remaining 3.4e-08.