Let's divide 815207 by 42
Our goal is to divide 815207 by 42.

Moving on 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
If we take 0 away from 8, we end up with 8.
Take the next digit (1) from the dividend and append it to 8, then repeat: 81 / 42

On to step 2:
The number 42 fits into 81 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 42 away from 81, we end up with 39.
Fetch the next digit (5) from the dividend, attach it to 39 and continue: 395 / 42

Advancing to step 3:
The number 42 fits into 395 9 times, leaving a remainder of 17.
Use 9 as the next digit of our solution. 
Result so far: 19.0
If we take 378 away from 395, we end up with 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 42

Going ahead to step 4:
The number 42 fits into 172 4 times, leaving a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 194.0
Deduct 168 from 172 and we're left with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 42

Step 5:
42 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 1940.0
Subtract 0 from 40 to get 40.
Append the next digit (7) from the dividend to 40 and continue with: 407 / 42

Let's proceed to step 6:
42 can be fit into 407 9 times, resulting in a remainder of 29.
Put 9 as the next digit of the answer. 
Result so far: 19409.0
Subtract 378 from 407 to get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 7:
42 goes into 290 6 times with a remainder of 38.
Put 6 as the next digit of the answer. 
Result so far: 19409.6
Subtract 252 from 290 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.

Let's proceed to step 8:
When dividing 380 by 42, we get 9 with a remainder of 2.
Put 9 as the next digit of the answer. 
Result so far: 19409.69
The remainder is 2 after subtracting 378 from 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 9:
If we divide 20 by 42, we get 0 and a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 19409.69
Deduct 0 from 20 and we're left 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.

On to step 10:
If we divide 200 by 42, we get 4 and a remainder of 32.
The number 4 becomes the next digit in our result. 
Result so far: 19409.6904
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.

Advancing to step 11:
When dividing 320 by 42, we get 7 with a remainder of 26.
The number 7 becomes the next digit in our result. 
Result so far: 19409.69047
The remainder is 26 after subtracting 294 from 320.
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 12:
The number 42 fits into 260 6 times, leaving a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 19409.690476
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.

On to step 13:
The number 42 fits into 80 1 times, leaving a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 19409.6904761
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.

Going ahead to step 14:
The number 42 fits into 380 9 times, leaving a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 19409.69047619
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 final outcome is 19409.69047619, with a leftover of 2e-09.