We look at the division of 42390940 by 848 
We want to divide 42390940 by 848.

Step 1:
4 divided by 848 is 0 with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 848

Moving on to step 2:
The number 848 fits into 42 0 times, leaving a remainder of 42.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Bring next digit (3) of the dividend behind the 42 and repeat the process: 423 / 848

Going ahead to step 3:
The number 848 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
Deduct 0 from 423 and we're left with 423.
Append the next digit (9) from the dividend to 423 and continue with: 4239 / 848

On to step 4:
848 can be fit into 4239 4 times, resulting in a remainder of 847.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 3392 away from 4239, we end up with 847.
Include the next digit (0) from the dividend after 847, then repeat: 8470 / 848

Moving on to step 5:
8470 divided by 848 is 9 with a remainder of 838.
Record the quotient 9 as the next digit in the result. 
Result so far: 49.0
Deduct 7632 from 8470 and we're left with 838.
Fetch the next digit (9) from the dividend, attach it to 838 and continue: 8389 / 848

On to step 6:
848 can be fit into 8389 9 times, resulting in a remainder of 757.
The number 9 becomes the next digit in our result. 
Result so far: 499.0
Subtract 7632 from 8389 to get 757.
Include the next digit (4) from the dividend after 757, then repeat: 7574 / 848

Step 7:
If we divide 7574 by 848, we get 8 and a remainder of 790.
Write down 8 as next digit of the result. 
Result so far: 4998.0
If we take 6784 away from 7574, we end up with 790.
Take the next digit (0) from the dividend and append it to 790, then repeat: 7900 / 848

On to step 8:
When dividing 7900 by 848, we get 9 with a remainder of 268.
Put 9 as the next digit of the answer. 
Result so far: 49989.0
Subtract 7632 from 7900 to get 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 9:
848 goes into 2680 3 times with a remainder of 136.
Put 3 as the next digit of the answer. 
Result so far: 49989.3
If we subtract 2544 from 2680, we get 136.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Step 10:
848 can be fit into 1360 1 times, resulting in a remainder of 512.
Write down 1 as next digit of the result. 
Result so far: 49989.31
The remainder is 512 after subtracting 848 from 1360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

On to step 11:
The number 848 fits into 5120 6 times, leaving a remainder of 32.
Use 6 as the next digit of our solution. 
Result so far: 49989.316
Subtract 5088 from 5120 to get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Let's proceed to step 12:
If we divide 320 by 848, we get 0 and a remainder of 320.
The next digit of our result is 0. 
Result so far: 49989.316
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Let's proceed to step 13:
If we divide 3200 by 848, we get 3 and a remainder of 656.
The number 3 becomes the next digit in our result. 
Result so far: 49989.31603
Deduct 2544 from 3200 and we're left with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Advancing to step 14:
6560 divided by 848 is 7 with a remainder of 624.
The next digit of our result is 7. 
Result so far: 49989.316037
Subtract 5936 from 6560 to get 624.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6240, and continue the process.

Going ahead to step 15:
If we divide 6240 by 848, we get 7 and a remainder of 304.
The number 7 becomes the next digit in our result. 
Result so far: 49989.3160377
If we take 5936 away from 6240, we end up with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

The quotient of the division is 49989.3160377, and the remainder is 3.04e-06.