42380388 divided by 851 
We want to figure out the number of times 42380388 can be divided by 851.

On to step 1:
The number 851 fits into 4 0 times, leaving a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 851

Going ahead to step 2:
42 divided by 851 is 0 with 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.
Grab the next digit (3) from the dividend, add it to 42, then carry on: 423 / 851

Moving on to step 3:
If we divide 423 by 851, we get 0 and a remainder of 423.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 423, we end up with 423.
Bring next digit (8) of the dividend behind the 423 and repeat the process: 4238 / 851

Moving on to step 4:
The number 851 fits into 4238 4 times, leaving a remainder of 834.
Write down 4 as next digit of the result. 
Result so far: 4.0
Subtracting 3404 from 4238 leaves us with 834.
Include the next digit (0) from the dividend after 834, then repeat: 8340 / 851

Going ahead to step 5:
8340 divided by 851 is 9 with a remainder of 681.
Write down 9 as next digit of the result. 
Result so far: 49.0
Subtracting 7659 from 8340 leaves us with 681.
Append the next digit (3) from the dividend to 681 and continue with: 6813 / 851

On to step 6:
The number 851 fits into 6813 8 times, leaving a remainder of 5.
Put 8 as the next digit of the answer. 
Result so far: 498.0
The remainder is 5 after subtracting 6808 from 6813.
Grab the next digit (8) from the dividend, add it to 5, then carry on: 58 / 851

Moving on to step 7:
When dividing 58 by 851, we get 0 with a remainder of 58.
Record the quotient 0 as the next digit in the result. 
Result so far: 4980.0
The remainder is 58 after subtracting 0 from 58.
Bring next digit (8) of the dividend behind the 58 and repeat the process: 588 / 851

Step 8:
588 divided by 851 is 0 with a remainder of 588.
Write down 0 as next digit of the result. 
Result so far: 49800.0
Deduct 0 from 588 and we're left with 588.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5880, and continue the process.

Advancing to step 9:
The number 851 fits into 5880 6 times, leaving a remainder of 774.
The number 6 becomes the next digit in our result. 
Result so far: 49800.6
The remainder is 774 after subtracting 5106 from 5880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7740, and continue the process.

Moving on to step 10:
If we divide 7740 by 851, we get 9 and a remainder of 81.
Use 9 as the next digit of our solution. 
Result so far: 49800.69
If we subtract 7659 from 7740, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Let's proceed to step 11:
851 goes into 810 0 times with a remainder of 810.
Write down 0 as next digit of the result. 
Result so far: 49800.69
Deduct 0 from 810 and we're left with 810.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8100, and continue the process.

Advancing to step 12:
If we divide 8100 by 851, we get 9 and a remainder of 441.
Use 9 as the next digit of our solution. 
Result so far: 49800.6909
If we subtract 7659 from 8100, we get 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

On to step 13:
If we divide 4410 by 851, we get 5 and a remainder of 155.
Use 5 as the next digit of our solution. 
Result so far: 49800.69095
If we subtract 4255 from 4410, we get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Step 14:
1550 divided by 851 is 1 with a remainder of 699.
The number 1 becomes the next digit in our result. 
Result so far: 49800.690951
Deduct 851 from 1550 and we're left with 699.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6990, and continue the process.

Moving on to step 15:
851 goes into 6990 8 times with a remainder of 182.
The number 8 becomes the next digit in our result. 
Result so far: 49800.6909518
If we subtract 6808 from 6990, we get 182.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Step 16:
851 goes into 1820 2 times with a remainder of 118.
The next digit of our result is 2. 
Result so far: 49800.69095182
If we take 1702 away from 1820, we end up with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

In conclusion, the division gives 49800.69095182 with a balance of 1.18e-07.