Let's divide 78517553 by 510
We want to figure out the number of times 78517553 can be divided by 510.

On to step 1:
510 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 510

Step 2:
510 goes into 78 0 times with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Fetch the next digit (5) from the dividend, attach it to 78 and continue: 785 / 510

Step 3:
The number 510 fits into 785 1 times, leaving a remainder of 275.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 510 away from 785, we end up with 275.
Include the next digit (1) from the dividend after 275, then repeat: 2751 / 510

Going ahead to step 4:
The number 510 fits into 2751 5 times, leaving a remainder of 201.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we subtract 2550 from 2751, we get 201.
Bring next digit (7) of the dividend behind the 201 and repeat the process: 2017 / 510

Moving on to step 5:
When dividing 2017 by 510, we get 3 with a remainder of 487.
Write down 3 as next digit of the result. 
Result so far: 153.0
Subtract 1530 from 2017 to get 487.
Take the next digit (5) from the dividend and append it to 487, then repeat: 4875 / 510

Going ahead to step 6:
If we divide 4875 by 510, we get 9 and a remainder of 285.
Write down 9 as next digit of the result. 
Result so far: 1539.0
Deduct 4590 from 4875 and we're left with 285.
Fetch the next digit (5) from the dividend, attach it to 285 and continue: 2855 / 510

Advancing to step 7:
The number 510 fits into 2855 5 times, leaving a remainder of 305.
Record the quotient 5 as the next digit in the result. 
Result so far: 15395.0
If we subtract 2550 from 2855, we get 305.
Bring next digit (3) of the dividend behind the 305 and repeat the process: 3053 / 510

Moving on to step 8:
If we divide 3053 by 510, we get 5 and a remainder of 503.
Use 5 as the next digit of our solution. 
Result so far: 153955.0
Deduct 2550 from 3053 and we're left with 503.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5030, and continue the process.

Going ahead to step 9:
When dividing 5030 by 510, we get 9 with a remainder of 440.
Record the quotient 9 as the next digit in the result. 
Result so far: 153955.9
Subtract 4590 from 5030 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Going ahead to step 10:
When dividing 4400 by 510, we get 8 with a remainder of 320.
Use 8 as the next digit of our solution. 
Result so far: 153955.98
Subtract 4080 from 4400 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Advancing to step 11:
If we divide 3200 by 510, we get 6 and a remainder of 140.
Record the quotient 6 as the next digit in the result. 
Result so far: 153955.986
Subtracting 3060 from 3200 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 12:
1400 divided by 510 is 2 with a remainder of 380.
Record the quotient 2 as the next digit in the result. 
Result so far: 153955.9862
Subtract 1020 from 1400 to get 380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3800, and continue the process.

Going ahead to step 13:
The number 510 fits into 3800 7 times, leaving a remainder of 230.
Use 7 as the next digit of our solution. 
Result so far: 153955.98627
Deduct 3570 from 3800 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Going ahead to step 14:
If we divide 2300 by 510, we get 4 and a remainder of 260.
Put 4 as the next digit of the answer. 
Result so far: 153955.986274
Deduct 2040 from 2300 and we're left with 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Going ahead to step 15:
If we divide 2600 by 510, we get 5 and a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 153955.9862745
If we subtract 2550 from 2600, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 16:
When dividing 500 by 510, we get 0 with a remainder of 500.
Write down 0 as next digit of the result. 
Result so far: 153955.9862745
If we subtract 0 from 500, we get 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

Our division results in 153955.9862745 with a remaining 5e-07.