Let's divide 42386353 by 840
Our goal is to divide 42386353 by 840.

Moving on to step 1:
If we divide 4 by 840, we get 0 and a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 840

Going ahead to step 2:
When dividing 42 by 840, we get 0 with a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Bring next digit (3) of the dividend behind the 42 and repeat the process: 423 / 840

Going ahead to step 3:
The number 840 fits into 423 0 times, leaving a remainder of 423.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 423 after subtracting 0 from 423.
Take the next digit (8) from the dividend and append it to 423, then repeat: 4238 / 840

Going ahead to step 4:
If we divide 4238 by 840, we get 5 and a remainder of 38.
Write down 5 as next digit of the result. 
Result so far: 5.0
Subtracting 4200 from 4238 leaves us with 38.
Append the next digit (6) from the dividend to 38 and continue with: 386 / 840

Step 5:
840 goes into 386 0 times with a remainder of 386.
Put 0 as the next digit of the answer. 
Result so far: 50.0
If we take 0 away from 386, we end up with 386.
Append the next digit (3) from the dividend to 386 and continue with: 3863 / 840

Advancing to step 6:
When dividing 3863 by 840, we get 4 with a remainder of 503.
The next digit of our result is 4. 
Result so far: 504.0
Subtracting 3360 from 3863 leaves us with 503.
Append the next digit (5) from the dividend to 503 and continue with: 5035 / 840

On to step 7:
840 can be fit into 5035 5 times, resulting in a remainder of 835.
The number 5 becomes the next digit in our result. 
Result so far: 5045.0
The remainder is 835 after subtracting 4200 from 5035.
Include the next digit (3) from the dividend after 835, then repeat: 8353 / 840

Moving on to step 8:
When dividing 8353 by 840, we get 9 with a remainder of 793.
The number 9 becomes the next digit in our result. 
Result so far: 50459.0
Subtracting 7560 from 8353 leaves us with 793.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7930, and continue the process.

Moving on to step 9:
The number 840 fits into 7930 9 times, leaving a remainder of 370.
Use 9 as the next digit of our solution. 
Result so far: 50459.9
Deduct 7560 from 7930 and we're left with 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

On to step 10:
840 goes into 3700 4 times with a remainder of 340.
Record the quotient 4 as the next digit in the result. 
Result so far: 50459.94
Subtract 3360 from 3700 to get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Moving on to step 11:
840 can be fit into 3400 4 times, resulting in a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 50459.944
Deduct 3360 from 3400 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.

After the division, we end up with 50459.944 and a remainder of 0.004.