Let's divide 862121 by 78
We want to figure out the number of times 862121 can be divided by 78.

Step 1:
78 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 78

Advancing to step 2:
86 divided by 78 is 1 with a remainder of 8.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 78 from 86, we get 8.
Include the next digit (2) from the dividend after 8, then repeat: 82 / 78

Going ahead to step 3:
82 divided by 78 is 1 with a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 11.0
Subtracting 78 from 82 leaves us with 4.
Include the next digit (1) from the dividend after 4, then repeat: 41 / 78

On to step 4:
78 goes into 41 0 times with a remainder of 41.
Record the quotient 0 as the next digit in the result. 
Result so far: 110.0
Subtracting 0 from 41 leaves us with 41.
Grab the next digit (2) from the dividend, add it to 41, then carry on: 412 / 78

Let's proceed to step 5:
412 divided by 78 is 5 with a remainder of 22.
Record the quotient 5 as the next digit in the result. 
Result so far: 1105.0
The remainder is 22 after subtracting 390 from 412.
Bring next digit (1) of the dividend behind the 22 and repeat the process: 221 / 78

Advancing to step 6:
When dividing 221 by 78, we get 2 with a remainder of 65.
Record the quotient 2 as the next digit in the result. 
Result so far: 11052.0
Subtract 156 from 221 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Advancing to step 7:
When dividing 650 by 78, we get 8 with a remainder of 26.
The next digit of our result is 8. 
Result so far: 11052.8
Subtract 624 from 650 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 8:
78 can be fit into 260 3 times, resulting in a remainder of 26.
The number 3 becomes the next digit in our result. 
Result so far: 11052.83
Subtracting 234 from 260 leaves us with 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 9:
78 goes into 260 3 times with a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 11052.833
The remainder is 26 after subtracting 234 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

After the division, we end up with 11052.833 and a remainder of 0.0026.