Let's divide 83402138 by 878
We want to divide 83402138 by 878.

Going ahead to step 1:
When dividing 8 by 878, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 878

Advancing to step 2:
The number 878 fits into 83 0 times, leaving a remainder of 83.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 83 to get 83.
Take the next digit (4) from the dividend and append it to 83, then repeat: 834 / 878

Advancing to step 3:
834 divided by 878 is 0 with a remainder of 834.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 834 leaves us with 834.
Grab the next digit (0) from the dividend, add it to 834, then carry on: 8340 / 878

On to step 4:
878 can be fit into 8340 9 times, resulting in a remainder of 438.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtract 7902 from 8340 to get 438.
Grab the next digit (2) from the dividend, add it to 438, then carry on: 4382 / 878

On to step 5:
878 goes into 4382 4 times with a remainder of 870.
Put 4 as the next digit of the answer. 
Result so far: 94.0
The remainder is 870 after subtracting 3512 from 4382.
Include the next digit (1) from the dividend after 870, then repeat: 8701 / 878

Going ahead to step 6:
If we divide 8701 by 878, we get 9 and a remainder of 799.
Put 9 as the next digit of the answer. 
Result so far: 949.0
The remainder is 799 after subtracting 7902 from 8701.
Fetch the next digit (3) from the dividend, attach it to 799 and continue: 7993 / 878

Step 7:
When dividing 7993 by 878, we get 9 with a remainder of 91.
Record the quotient 9 as the next digit in the result. 
Result so far: 9499.0
Subtracting 7902 from 7993 leaves us with 91.
Include the next digit (8) from the dividend after 91, then repeat: 918 / 878

Advancing to step 8:
918 divided by 878 is 1 with a remainder of 40.
Write down 1 as next digit of the result. 
Result so far: 94991.0
Deduct 878 from 918 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.

Advancing to step 9:
The number 878 fits into 400 0 times, leaving a remainder of 400.
Put 0 as the next digit of the answer. 
Result so far: 94991.0
If we subtract 0 from 400, we get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 10:
When dividing 4000 by 878, we get 4 with a remainder of 488.
The number 4 becomes the next digit in our result. 
Result so far: 94991.04
Subtracting 3512 from 4000 leaves us with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Step 11:
The number 878 fits into 4880 5 times, leaving a remainder of 490.
The next digit of our result is 5. 
Result so far: 94991.045
If we take 4390 away from 4880, we end up with 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Step 12:
4900 divided by 878 is 5 with a remainder of 510.
Write down 5 as next digit of the result. 
Result so far: 94991.0455
Deduct 4390 from 4900 and we're left with 510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5100, and continue the process.

The final result is 94991.0455 with a remainder of 0.0051.