We look at the division of 52188215 by 786 
Let's see how many times 786 fits into 52188215.

On to step 1:
The number 786 fits into 5 0 times, leaving a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 786

Let's proceed to step 2:
The number 786 fits into 52 0 times, leaving a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Append the next digit (1) from the dividend to 52 and continue with: 521 / 786

Going ahead to step 3:
The number 786 fits into 521 0 times, leaving a remainder of 521.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 521 leaves us with 521.
Fetch the next digit (8) from the dividend, attach it to 521 and continue: 5218 / 786

On to step 4:
786 goes into 5218 6 times with a remainder of 502.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
Subtracting 4716 from 5218 leaves us with 502.
Grab the next digit (8) from the dividend, add it to 502, then carry on: 5028 / 786

Step 5:
If we divide 5028 by 786, we get 6 and a remainder of 312.
Put 6 as the next digit of the answer. 
Result so far: 66.0
Deduct 4716 from 5028 and we're left with 312.
Grab the next digit (2) from the dividend, add it to 312, then carry on: 3122 / 786

Step 6:
The number 786 fits into 3122 3 times, leaving a remainder of 764.
The number 3 becomes the next digit in our result. 
Result so far: 663.0
If we subtract 2358 from 3122, we get 764.
Take the next digit (1) from the dividend and append it to 764, then repeat: 7641 / 786

Step 7:
786 goes into 7641 9 times with a remainder of 567.
Use 9 as the next digit of our solution. 
Result so far: 6639.0
Subtract 7074 from 7641 to get 567.
Grab the next digit (5) from the dividend, add it to 567, then carry on: 5675 / 786

Moving on to step 8:
If we divide 5675 by 786, we get 7 and a remainder of 173.
The next digit of our result is 7. 
Result so far: 66397.0
If we subtract 5502 from 5675, we get 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

Advancing to step 9:
786 goes into 1730 2 times with a remainder of 158.
The number 2 becomes the next digit in our result. 
Result so far: 66397.2
If we subtract 1572 from 1730, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

On to step 10:
The number 786 fits into 1580 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 66397.22
If we subtract 1572 from 1580, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 66397.22 and a remainder of 0.008.