15960072 divided by 123 
The aim is to understand the frequency of 123 in 15960072.

Moving on to step 1:
The number 123 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Grab the next digit (5) from the dividend, add it to 1, then carry on: 15 / 123

Step 2:
123 can be fit into 15 0 times, resulting in a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 123

On to step 3:
123 can be fit into 159 1 times, resulting in a remainder of 36.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 36 after subtracting 123 from 159.
Grab the next digit (6) from the dividend, add it to 36, then carry on: 366 / 123

Going ahead to step 4:
123 can be fit into 366 2 times, resulting in a remainder of 120.
Use 2 as the next digit of our solution. 
Result so far: 12.0
The remainder is 120 after subtracting 246 from 366.
Grab the next digit (0) from the dividend, add it to 120, then carry on: 1200 / 123

Step 5:
The number 123 fits into 1200 9 times, leaving a remainder of 93.
Record the quotient 9 as the next digit in the result. 
Result so far: 129.0
Deduct 1107 from 1200 and we're left with 93.
Fetch the next digit (0) from the dividend, attach it to 93 and continue: 930 / 123

Going ahead to step 6:
123 can be fit into 930 7 times, resulting in a remainder of 69.
The next digit of our result is 7. 
Result so far: 1297.0
If we subtract 861 from 930, we get 69.
Bring next digit (7) of the dividend behind the 69 and repeat the process: 697 / 123

Let's proceed to step 7:
When dividing 697 by 123, we get 5 with a remainder of 82.
Put 5 as the next digit of the answer. 
Result so far: 12975.0
The remainder is 82 after subtracting 615 from 697.
Grab the next digit (2) from the dividend, add it to 82, then carry on: 822 / 123

Let's proceed to step 8:
123 can be fit into 822 6 times, resulting in a remainder of 84.
Write down 6 as next digit of the result. 
Result so far: 129756.0
If we take 738 away from 822, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Advancing to step 9:
123 goes into 840 6 times with a remainder of 102.
Put 6 as the next digit of the answer. 
Result so far: 129756.6
Subtract 738 from 840 to get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 10:
If we divide 1020 by 123, we get 8 and a remainder of 36.
Use 8 as the next digit of our solution. 
Result so far: 129756.68
Deduct 984 from 1020 and we're left with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 11:
The number 123 fits into 360 2 times, leaving a remainder of 114.
Use 2 as the next digit of our solution. 
Result so far: 129756.682
If we take 246 away from 360, we end up with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Advancing to step 12:
123 can be fit into 1140 9 times, resulting in a remainder of 33.
Record the quotient 9 as the next digit in the result. 
Result so far: 129756.6829
If we subtract 1107 from 1140, we get 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Step 13:
If we divide 330 by 123, we get 2 and a remainder of 84.
The next digit of our result is 2. 
Result so far: 129756.68292
The remainder is 84 after subtracting 246 from 330.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Going ahead to step 14:
123 goes into 840 6 times with a remainder of 102.
Use 6 as the next digit of our solution. 
Result so far: 129756.682926
Deduct 738 from 840 and we're left with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Going ahead to step 15:
The number 123 fits into 1020 8 times, leaving a remainder of 36.
The number 8 becomes the next digit in our result. 
Result so far: 129756.6829268
Subtracting 984 from 1020 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 16:
123 can be fit into 360 2 times, resulting in a remainder of 114.
Put 2 as the next digit of the answer. 
Result so far: 129756.68292682
Subtracting 246 from 360 leaves us with 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

After the division, we end up with 129756.68292682 and a remainder of 1.14e-07.