We're dividing 51627650 by 666 
We want to figure out the number of times 51627650 can be divided by 666.

Let's proceed to step 1:
5 divided by 666 is 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 666

Step 2:
If we divide 51 by 666, we get 0 and a remainder of 51.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (6) of the dividend behind the 51 and repeat the process: 516 / 666

On to step 3:
If we divide 516 by 666, we get 0 and a remainder of 516.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 516 and we're left with 516.
Bring next digit (2) of the dividend behind the 516 and repeat the process: 5162 / 666

On to step 4:
5162 divided by 666 is 7 with a remainder of 500.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
The remainder is 500 after subtracting 4662 from 5162.
Append the next digit (7) from the dividend to 500 and continue with: 5007 / 666

On to step 5:
5007 divided by 666 is 7 with a remainder of 345.
Record the quotient 7 as the next digit in the result. 
Result so far: 77.0
Deduct 4662 from 5007 and we're left with 345.
Grab the next digit (6) from the dividend, add it to 345, then carry on: 3456 / 666

Let's proceed to step 6:
If we divide 3456 by 666, we get 5 and a remainder of 126.
The next digit of our result is 5. 
Result so far: 775.0
Deduct 3330 from 3456 and we're left with 126.
Include the next digit (5) from the dividend after 126, then repeat: 1265 / 666

Advancing to step 7:
666 goes into 1265 1 times with a remainder of 599.
Record the quotient 1 as the next digit in the result. 
Result so far: 7751.0
Subtracting 666 from 1265 leaves us with 599.
Take the next digit (0) from the dividend and append it to 599, then repeat: 5990 / 666

Going ahead to step 8:
666 can be fit into 5990 8 times, resulting in a remainder of 662.
Put 8 as the next digit of the answer. 
Result so far: 77518.0
Deduct 5328 from 5990 and we're left with 662.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6620, and continue the process.

Advancing to step 9:
The number 666 fits into 6620 9 times, leaving a remainder of 626.
Write down 9 as next digit of the result. 
Result so far: 77518.9
If we subtract 5994 from 6620, we get 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Step 10:
666 can be fit into 6260 9 times, resulting in a remainder of 266.
The next digit of our result is 9. 
Result so far: 77518.99
If we subtract 5994 from 6260, we get 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

After the division, we end up with 77518.99 and a remainder of 0.266.