51309860 divided by 66 
We want to divide 51309860 by 66.

Step 1:
If we divide 5 by 66, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 66

Advancing to step 2:
66 can be fit into 51 0 times, resulting in a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 51, we get 51.
Include the next digit (3) from the dividend after 51, then repeat: 513 / 66

Let's proceed to step 3:
66 goes into 513 7 times with a remainder of 51.
The next digit of our result is 7. 
Result so far: 7.0
Subtracting 462 from 513 leaves us with 51.
Grab the next digit (0) from the dividend, add it to 51, then carry on: 510 / 66

Let's proceed to step 4:
The number 66 fits into 510 7 times, leaving a remainder of 48.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
Subtracting 462 from 510 leaves us with 48.
Bring next digit (9) of the dividend behind the 48 and repeat the process: 489 / 66

Going ahead to step 5:
66 goes into 489 7 times with a remainder of 27.
The next digit of our result is 7. 
Result so far: 777.0
Deduct 462 from 489 and we're left with 27.
Append the next digit (8) from the dividend to 27 and continue with: 278 / 66

Advancing to step 6:
278 divided by 66 is 4 with a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 7774.0
Subtracting 264 from 278 leaves us with 14.
Include the next digit (6) from the dividend after 14, then repeat: 146 / 66

Step 7:
If we divide 146 by 66, we get 2 and a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 77742.0
If we subtract 132 from 146, we get 14.
Fetch the next digit (0) from the dividend, attach it to 14 and continue: 140 / 66

Let's proceed to step 8:
66 goes into 140 2 times with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 777422.0
Subtract 132 from 140 to 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.

Step 9:
66 goes into 80 1 times with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 777422.1
If we subtract 66 from 80, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 10:
66 goes into 140 2 times with a remainder of 8.
The number 2 becomes the next digit in our result. 
Result so far: 777422.12
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Let's proceed to step 11:
If we divide 80 by 66, we get 1 and a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 777422.121
The remainder is 14 after subtracting 66 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 12:
66 goes into 140 2 times with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 777422.1212
Subtract 132 from 140 to 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.

On to step 13:
66 can be fit into 80 1 times, resulting in a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 777422.12121
Deduct 66 from 80 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 14:
The number 66 fits into 140 2 times, leaving a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 777422.121212
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 15:
If we divide 80 by 66, we get 1 and a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 777422.1212121
If we subtract 66 from 80, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 16:
When dividing 140 by 66, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 777422.12121212
Subtracting 132 from 140 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final outcome is 777422.12121212, with a leftover of 8e-09.