We're dividing 51514978 by 515 
We want to figure out the number of times 51514978 can be divided by 515.

Moving on to step 1:
When dividing 5 by 515, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Append the next digit (1) from the dividend to 5 and continue with: 51 / 515

Moving on to step 2:
515 can be fit into 51 0 times, resulting in a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 515

Advancing to step 3:
When dividing 515 by 515, we get 1 with a remainder of 0.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 515 from 515, we get 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 515

Step 4:
515 can be fit into 1 0 times, resulting in a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 10.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 515

Advancing to step 5:
The number 515 fits into 14 0 times, leaving a remainder of 14.
The number 0 becomes the next digit in our result. 
Result so far: 100.0
If we take 0 away from 14, we end up with 14.
Grab the next digit (9) from the dividend, add it to 14, then carry on: 149 / 515

On to step 6:
When dividing 149 by 515, we get 0 with a remainder of 149.
Record the quotient 0 as the next digit in the result. 
Result so far: 1000.0
Subtracting 0 from 149 leaves us with 149.
Grab the next digit (7) from the dividend, add it to 149, then carry on: 1497 / 515

Moving on to step 7:
1497 divided by 515 is 2 with a remainder of 467.
Put 2 as the next digit of the answer. 
Result so far: 10002.0
Subtracting 1030 from 1497 leaves us with 467.
Fetch the next digit (8) from the dividend, attach it to 467 and continue: 4678 / 515

Moving on to step 8:
If we divide 4678 by 515, we get 9 and a remainder of 43.
Record the quotient 9 as the next digit in the result. 
Result so far: 100029.0
Deduct 4635 from 4678 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Moving on to step 9:
If we divide 430 by 515, we get 0 and a remainder of 430.
Put 0 as the next digit of the answer. 
Result so far: 100029.0
Subtracting 0 from 430 leaves us with 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4300, and continue the process.

Let's proceed to step 10:
When dividing 4300 by 515, we get 8 with a remainder of 180.
Put 8 as the next digit of the answer. 
Result so far: 100029.08
Subtracting 4120 from 4300 leaves us with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 11:
If we divide 1800 by 515, we get 3 and a remainder of 255.
Use 3 as the next digit of our solution. 
Result so far: 100029.083
Subtracting 1545 from 1800 leaves us with 255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2550, and continue the process.

Step 12:
If we divide 2550 by 515, we get 4 and a remainder of 490.
Record the quotient 4 as the next digit in the result. 
Result so far: 100029.0834
If we take 2060 away from 2550, 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 13:
When dividing 4900 by 515, we get 9 with a remainder of 265.
Put 9 as the next digit of the answer. 
Result so far: 100029.08349
If we subtract 4635 from 4900, we get 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Let's proceed to step 14:
515 can be fit into 2650 5 times, resulting in a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 100029.083495
If we take 2575 away from 2650, we end up with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

On to step 15:
515 goes into 750 1 times with a remainder of 235.
The number 1 becomes the next digit in our result. 
Result so far: 100029.0834951
Deduct 515 from 750 and we're left with 235.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2350, and continue the process.

Moving on to step 16:
When dividing 2350 by 515, we get 4 with a remainder of 290.
Put 4 as the next digit of the answer. 
Result so far: 100029.08349514
Deduct 2060 from 2350 and we're left with 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

After the division, we end up with 100029.08349514 and a remainder of 2.9e-07.