Let's divide 51309109 by 651
The aim is to understand the frequency of 651 in 51309109.

Let's proceed to step 1:
When dividing 5 by 651, we get 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 651

On to step 2:
If we divide 51 by 651, we get 0 and a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Bring next digit (3) of the dividend behind the 51 and repeat the process: 513 / 651

Advancing to step 3:
651 can be fit into 513 0 times, resulting in a remainder of 513.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 513 and we're left with 513.
Grab the next digit (0) from the dividend, add it to 513, then carry on: 5130 / 651

Advancing to step 4:
651 can be fit into 5130 7 times, resulting in a remainder of 573.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 573 after subtracting 4557 from 5130.
Take the next digit (9) from the dividend and append it to 573, then repeat: 5739 / 651

On to step 5:
5739 divided by 651 is 8 with a remainder of 531.
The next digit of our result is 8. 
Result so far: 78.0
Deduct 5208 from 5739 and we're left with 531.
Fetch the next digit (1) from the dividend, attach it to 531 and continue: 5311 / 651

On to step 6:
If we divide 5311 by 651, we get 8 and a remainder of 103.
Record the quotient 8 as the next digit in the result. 
Result so far: 788.0
The remainder is 103 after subtracting 5208 from 5311.
Take the next digit (0) from the dividend and append it to 103, then repeat: 1030 / 651

Advancing to step 7:
The number 651 fits into 1030 1 times, leaving a remainder of 379.
The number 1 becomes the next digit in our result. 
Result so far: 7881.0
If we subtract 651 from 1030, we get 379.
Bring next digit (9) of the dividend behind the 379 and repeat the process: 3799 / 651

Let's proceed to step 8:
3799 divided by 651 is 5 with a remainder of 544.
Put 5 as the next digit of the answer. 
Result so far: 78815.0
Deduct 3255 from 3799 and we're left with 544.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5440, and continue the process.

Let's proceed to step 9:
5440 divided by 651 is 8 with a remainder of 232.
Write down 8 as next digit of the result. 
Result so far: 78815.8
If we take 5208 away from 5440, we end up with 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

On to step 10:
If we divide 2320 by 651, we get 3 and a remainder of 367.
Put 3 as the next digit of the answer. 
Result so far: 78815.83
The remainder is 367 after subtracting 1953 from 2320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3670, and continue the process.

On to step 11:
If we divide 3670 by 651, we get 5 and a remainder of 415.
The next digit of our result is 5. 
Result so far: 78815.835
If we subtract 3255 from 3670, we get 415.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4150, and continue the process.

Step 12:
651 goes into 4150 6 times with a remainder of 244.
The next digit of our result is 6. 
Result so far: 78815.8356
Deduct 3906 from 4150 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 13:
2440 divided by 651 is 3 with a remainder of 487.
Write down 3 as next digit of the result. 
Result so far: 78815.83563
Subtracting 1953 from 2440 leaves us with 487.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4870, and continue the process.

On to step 14:
651 can be fit into 4870 7 times, resulting in a remainder of 313.
Write down 7 as next digit of the result. 
Result so far: 78815.835637
Subtracting 4557 from 4870 leaves us with 313.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3130, and continue the process.

Let's proceed to step 15:
651 can be fit into 3130 4 times, resulting in a remainder of 526.
Record the quotient 4 as the next digit in the result. 
Result so far: 78815.8356374
Subtracting 2604 from 3130 leaves us with 526.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5260, and continue the process.

On to step 16:
The number 651 fits into 5260 8 times, leaving a remainder of 52.
The number 8 becomes the next digit in our result. 
Result so far: 78815.83563748
Deduct 5208 from 5260 and we're left with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

The final outcome is 78815.83563748, with a leftover of 5.2e-08.