We're dividing 78210866 by 55 
Our goal is to divide 78210866 by 55.

Let's proceed to step 1:
7 divided by 55 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 55

Let's proceed to step 2:
The number 55 fits into 78 1 times, leaving a remainder of 23.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 55 from 78 leaves us with 23.
Append the next digit (2) from the dividend to 23 and continue with: 232 / 55

Going ahead to step 3:
The number 55 fits into 232 4 times, leaving a remainder of 12.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we take 220 away from 232, we end up with 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 55

Step 4:
When dividing 121 by 55, we get 2 with a remainder of 11.
The next digit of our result is 2. 
Result so far: 142.0
Subtract 110 from 121 to get 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 55

Advancing to step 5:
The number 55 fits into 110 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 1422.0
Deduct 110 from 110 and we're left with 0.
Bring next digit (8) of the dividend behind the 0 and repeat the process: 8 / 55

Going ahead to step 6:
8 divided by 55 is 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 14220.0
If we take 0 away from 8, we end up with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 55

Let's proceed to step 7:
55 goes into 86 1 times with a remainder of 31.
The next digit of our result is 1. 
Result so far: 142201.0
Deduct 55 from 86 and we're left with 31.
Take the next digit (6) from the dividend and append it to 31, then repeat: 316 / 55

On to step 8:
When dividing 316 by 55, we get 5 with a remainder of 41.
Record the quotient 5 as the next digit in the result. 
Result so far: 1422015.0
Subtracting 275 from 316 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Going ahead to step 9:
55 goes into 410 7 times with a remainder of 25.
Write down 7 as next digit of the result. 
Result so far: 1422015.7
Subtracting 385 from 410 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Step 10:
If we divide 250 by 55, we get 4 and a remainder of 30.
The next digit of our result is 4. 
Result so far: 1422015.74
Subtract 220 from 250 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 11:
When dividing 300 by 55, we get 5 with a remainder of 25.
The next digit of our result is 5. 
Result so far: 1422015.745
Subtract 275 from 300 to get 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Going ahead to step 12:
The number 55 fits into 250 4 times, leaving a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 1422015.7454
Deduct 220 from 250 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 13:
The number 55 fits into 300 5 times, leaving a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 1422015.74545
Subtracting 275 from 300 leaves us with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

Let's proceed to step 14:
55 goes into 250 4 times with a remainder of 30.
Write down 4 as next digit of the result. 
Result so far: 1422015.745454
If we take 220 away from 250, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Moving on to step 15:
300 divided by 55 is 5 with a remainder of 25.
Write down 5 as next digit of the result. 
Result so far: 1422015.7454545
If we take 275 away from 300, we end up with 25.
Since there are no more digits in the dividend, we add a zero to the remainder making it 250, and continue the process.

On to step 16:
55 can be fit into 250 4 times, resulting in a remainder of 30.
Record the quotient 4 as the next digit in the result. 
Result so far: 1422015.74545454
Subtracting 220 from 250 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

In conclusion, the division gives 1422015.74545454 with a balance of 3e-08.