Let's divide 51092021 by 661
We want to figure out the number of times 51092021 can be divided by 661.

Going ahead to step 1:
When dividing 5 by 661, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 661

Advancing to step 2:
661 can be fit into 51 0 times, resulting in a remainder of 51.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (0) from the dividend after 51, then repeat: 510 / 661

Going ahead to step 3:
If we divide 510 by 661, we get 0 and a remainder of 510.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 510, we get 510.
Grab the next digit (9) from the dividend, add it to 510, then carry on: 5109 / 661

Let's proceed to step 4:
When dividing 5109 by 661, we get 7 with a remainder of 482.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Deduct 4627 from 5109 and we're left with 482.
Bring next digit (2) of the dividend behind the 482 and repeat the process: 4822 / 661

Moving on to step 5:
4822 divided by 661 is 7 with a remainder of 195.
Write down 7 as next digit of the result. 
Result so far: 77.0
Subtract 4627 from 4822 to get 195.
Include the next digit (0) from the dividend after 195, then repeat: 1950 / 661

Going ahead to step 6:
When dividing 1950 by 661, we get 2 with a remainder of 628.
The next digit of our result is 2. 
Result so far: 772.0
Subtracting 1322 from 1950 leaves us with 628.
Include the next digit (2) from the dividend after 628, then repeat: 6282 / 661

Let's proceed to step 7:
661 can be fit into 6282 9 times, resulting in a remainder of 333.
The number 9 becomes the next digit in our result. 
Result so far: 7729.0
If we take 5949 away from 6282, we end up with 333.
Take the next digit (1) from the dividend and append it to 333, then repeat: 3331 / 661

Going ahead to step 8:
The number 661 fits into 3331 5 times, leaving a remainder of 26.
The number 5 becomes the next digit in our result. 
Result so far: 77295.0
The remainder is 26 after subtracting 3305 from 3331.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Step 9:
661 goes into 260 0 times with a remainder of 260.
Put 0 as the next digit of the answer. 
Result so far: 77295.0
Subtracting 0 from 260 leaves us 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.

Step 10:
When dividing 2600 by 661, we get 3 with a remainder of 617.
Use 3 as the next digit of our solution. 
Result so far: 77295.03
If we take 1983 away from 2600, we end up with 617.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6170, and continue the process.

On to step 11:
When dividing 6170 by 661, we get 9 with a remainder of 221.
Put 9 as the next digit of the answer. 
Result so far: 77295.039
Subtract 5949 from 6170 to get 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

Step 12:
If we divide 2210 by 661, we get 3 and a remainder of 227.
Put 3 as the next digit of the answer. 
Result so far: 77295.0393
Deduct 1983 from 2210 and we're left with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Step 13:
661 goes into 2270 3 times with a remainder of 287.
Put 3 as the next digit of the answer. 
Result so far: 77295.03933
If we subtract 1983 from 2270, we get 287.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2870, and continue the process.

In conclusion, the division gives 77295.03933 with a balance of 0.000287.