We're dividing 12380510 by 428 
The aim is to understand the frequency of 428 in 12380510.

Step 1:
428 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 428

Moving on to step 2:
428 can be fit into 12 0 times, resulting in a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Append the next digit (3) from the dividend to 12 and continue with: 123 / 428

Moving on to step 3:
428 can be fit into 123 0 times, resulting in a remainder of 123.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 123 and we're left with 123.
Grab the next digit (8) from the dividend, add it to 123, then carry on: 1238 / 428

Step 4:
1238 divided by 428 is 2 with a remainder of 382.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 856 from 1238 to get 382.
Fetch the next digit (0) from the dividend, attach it to 382 and continue: 3820 / 428

Going ahead to step 5:
3820 divided by 428 is 8 with a remainder of 396.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
If we subtract 3424 from 3820, we get 396.
Append the next digit (5) from the dividend to 396 and continue with: 3965 / 428

Going ahead to step 6:
3965 divided by 428 is 9 with a remainder of 113.
The next digit of our result is 9. 
Result so far: 289.0
Deduct 3852 from 3965 and we're left with 113.
Bring next digit (1) of the dividend behind the 113 and repeat the process: 1131 / 428

Advancing to step 7:
428 goes into 1131 2 times with a remainder of 275.
Record the quotient 2 as the next digit in the result. 
Result so far: 2892.0
If we subtract 856 from 1131, we get 275.
Grab the next digit (0) from the dividend, add it to 275, then carry on: 2750 / 428

Advancing to step 8:
If we divide 2750 by 428, we get 6 and a remainder of 182.
The number 6 becomes the next digit in our result. 
Result so far: 28926.0
The remainder is 182 after subtracting 2568 from 2750.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1820, and continue the process.

Moving on to step 9:
The number 428 fits into 1820 4 times, leaving a remainder of 108.
Use 4 as the next digit of our solution. 
Result so far: 28926.4
If we take 1712 away from 1820, we end up with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 10:
428 goes into 1080 2 times with a remainder of 224.
The number 2 becomes the next digit in our result. 
Result so far: 28926.42
Deduct 856 from 1080 and we're left with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 11:
When dividing 2240 by 428, we get 5 with a remainder of 100.
Use 5 as the next digit of our solution. 
Result so far: 28926.425
The remainder is 100 after subtracting 2140 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Moving on to step 12:
428 goes into 1000 2 times with a remainder of 144.
Use 2 as the next digit of our solution. 
Result so far: 28926.4252
The remainder is 144 after subtracting 856 from 1000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Step 13:
1440 divided by 428 is 3 with a remainder of 156.
Write down 3 as next digit of the result. 
Result so far: 28926.42523
If we subtract 1284 from 1440, we get 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Moving on to step 14:
If we divide 1560 by 428, we get 3 and a remainder of 276.
The number 3 becomes the next digit in our result. 
Result so far: 28926.425233
The remainder is 276 after subtracting 1284 from 1560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

The quotient of the division is 28926.425233, and the remainder is 2.76e-05.