We look at the division of 646901 by 42 
We want to figure out the number of times 646901 can be divided by 42.

Advancing to step 1:
42 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 42

On to step 2:
When dividing 64 by 42, we get 1 with a remainder of 22.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 42 away from 64, we end up with 22.
Bring next digit (6) of the dividend behind the 22 and repeat the process: 226 / 42

Advancing to step 3:
226 divided by 42 is 5 with a remainder of 16.
The next digit of our result is 5. 
Result so far: 15.0
Subtract 210 from 226 to get 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 42

Advancing to step 4:
The number 42 fits into 169 4 times, leaving a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 154.0
If we subtract 168 from 169, we get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 42

Going ahead to step 5:
10 divided by 42 is 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 1540.0
Subtracting 0 from 10 leaves us with 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 42

Step 6:
42 goes into 101 2 times with a remainder of 17.
The next digit of our result is 2. 
Result so far: 15402.0
Subtract 84 from 101 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 7:
42 can be fit into 170 4 times, resulting in a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 15402.4
Subtracting 168 from 170 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.

Going ahead to step 8:
42 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 15402.4
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 9:
The number 42 fits into 200 4 times, leaving a remainder of 32.
Record the quotient 4 as the next digit in the result. 
Result so far: 15402.404
If we take 168 away from 200, we end up 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.

On to step 10:
42 can be fit into 320 7 times, resulting in a remainder of 26.
Use 7 as the next digit of our solution. 
Result so far: 15402.4047
Subtract 294 from 320 to 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.

Going ahead to step 11:
When dividing 260 by 42, we get 6 with a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 15402.40476
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.

Let's proceed to step 12:
42 can be fit into 80 1 times, resulting in a remainder of 38.
The next digit of our result is 1. 
Result so far: 15402.404761
If we subtract 42 from 80, we 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 13:
When dividing 380 by 42, we get 9 with a remainder of 2.
Record the quotient 9 as the next digit in the result. 
Result so far: 15402.4047619
If we subtract 378 from 380, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 14:
When dividing 20 by 42, we get 0 with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 15402.4047619
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final result is 15402.4047619 with a remainder of 2e-08.