869451 ÷ 42 
We're looking to find how many times 42 goes into 869451.

Let's proceed to step 1:
42 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 42

Going ahead to step 2:
42 goes into 86 2 times with a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 84 from 86 and we're left with 2.
Append the next digit (9) from the dividend to 2 and continue with: 29 / 42

Step 3:
42 can be fit into 29 0 times, resulting in a remainder of 29.
Put 0 as the next digit of the answer. 
Result so far: 20.0
Subtract 0 from 29 to get 29.
Fetch the next digit (4) from the dividend, attach it to 29 and continue: 294 / 42

Let's proceed to step 4:
42 goes into 294 7 times with a remainder of 0.
The next digit of our result is 7. 
Result so far: 207.0
Subtract 294 from 294 to get 0.
Bring next digit (5) of the dividend behind the 0 and repeat the process: 5 / 42

Let's proceed to step 5:
42 goes into 5 0 times with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 2070.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 42

Moving on to step 6:
The number 42 fits into 51 1 times, leaving a remainder of 9.
The next digit of our result is 1. 
Result so far: 20701.0
Subtracting 42 from 51 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
If we divide 90 by 42, we get 2 and a remainder of 6.
The next digit of our result is 2. 
Result so far: 20701.2
The remainder is 6 after subtracting 84 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 8:
If we divide 60 by 42, we get 1 and a remainder of 18.
The number 1 becomes the next digit in our result. 
Result so far: 20701.21
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 9:
180 divided by 42 is 4 with a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 20701.214
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 10:
42 can be fit into 120 2 times, resulting in a remainder of 36.
The next digit of our result is 2. 
Result so far: 20701.2142
Deduct 84 from 120 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 11:
When dividing 360 by 42, we get 8 with a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 20701.21428
Deduct 336 from 360 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
When dividing 240 by 42, we get 5 with a remainder of 30.
Record the quotient 5 as the next digit in the result. 
Result so far: 20701.214285
The remainder is 30 after subtracting 210 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 13:
42 can be fit into 300 7 times, resulting in a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 20701.2142857
The remainder is 6 after subtracting 294 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 14:
If we divide 60 by 42, we get 1 and a remainder of 18.
The next digit of our result is 1. 
Result so far: 20701.21428571
Deduct 42 from 60 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Our division results in 20701.21428571 with a remaining 1.8e-08.