We're dividing 66516215 by 259 
We want to figure out the number of times 66516215 can be divided by 259.

Step 1:
259 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 259

On to step 2:
259 can be fit into 66 0 times, resulting in a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (5) from the dividend and append it to 66, then repeat: 665 / 259

Step 3:
665 divided by 259 is 2 with a remainder of 147.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 518 from 665, we get 147.
Append the next digit (1) from the dividend to 147 and continue with: 1471 / 259

Advancing to step 4:
If we divide 1471 by 259, we get 5 and a remainder of 176.
Use 5 as the next digit of our solution. 
Result so far: 25.0
If we subtract 1295 from 1471, we get 176.
Grab the next digit (6) from the dividend, add it to 176, then carry on: 1766 / 259

On to step 5:
259 goes into 1766 6 times with a remainder of 212.
The number 6 becomes the next digit in our result. 
Result so far: 256.0
Subtract 1554 from 1766 to get 212.
Fetch the next digit (2) from the dividend, attach it to 212 and continue: 2122 / 259

Step 6:
If we divide 2122 by 259, we get 8 and a remainder of 50.
Use 8 as the next digit of our solution. 
Result so far: 2568.0
The remainder is 50 after subtracting 2072 from 2122.
Append the next digit (1) from the dividend to 50 and continue with: 501 / 259

Step 7:
The number 259 fits into 501 1 times, leaving a remainder of 242.
The number 1 becomes the next digit in our result. 
Result so far: 25681.0
Deduct 259 from 501 and we're left with 242.
Include the next digit (5) from the dividend after 242, then repeat: 2425 / 259

Moving on to step 8:
When dividing 2425 by 259, we get 9 with a remainder of 94.
Write down 9 as next digit of the result. 
Result so far: 256819.0
Subtract 2331 from 2425 to get 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Step 9:
The number 259 fits into 940 3 times, leaving a remainder of 163.
Put 3 as the next digit of the answer. 
Result so far: 256819.3
Deduct 777 from 940 and we're left with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Let's proceed to step 10:
The number 259 fits into 1630 6 times, leaving a remainder of 76.
Write down 6 as next digit of the result. 
Result so far: 256819.36
Deduct 1554 from 1630 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

On to step 11:
If we divide 760 by 259, we get 2 and a remainder of 242.
Record the quotient 2 as the next digit in the result. 
Result so far: 256819.362
If we take 518 away from 760, we end up with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 12:
259 can be fit into 2420 9 times, resulting in a remainder of 89.
Record the quotient 9 as the next digit in the result. 
Result so far: 256819.3629
Subtract 2331 from 2420 to get 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 13:
The number 259 fits into 890 3 times, leaving a remainder of 113.
Record the quotient 3 as the next digit in the result. 
Result so far: 256819.36293
The remainder is 113 after subtracting 777 from 890.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1130, and continue the process.

Let's proceed to step 14:
When dividing 1130 by 259, we get 4 with a remainder of 94.
Put 4 as the next digit of the answer. 
Result so far: 256819.362934
Deduct 1036 from 1130 and we're left with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

On to step 15:
259 can be fit into 940 3 times, resulting in a remainder of 163.
Record the quotient 3 as the next digit in the result. 
Result so far: 256819.3629343
Subtracting 777 from 940 leaves us with 163.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1630, and continue the process.

Advancing to step 16:
When dividing 1630 by 259, we get 6 with a remainder of 76.
The number 6 becomes the next digit in our result. 
Result so far: 256819.36293436
If we take 1554 away from 1630, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

The final result is 256819.36293436 with a remainder of 7.6e-08.