We look at the division of 13010251 by 387 
The aim is to understand the frequency of 387 in 13010251.

Advancing to step 1:
387 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 387

Step 2:
13 divided by 387 is 0 with a remainder of 13.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 13, we end up with 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 387

Let's proceed to step 3:
If we divide 130 by 387, we get 0 and a remainder of 130.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 130, we get 130.
Include the next digit (1) from the dividend after 130, then repeat: 1301 / 387

Moving on to step 4:
The number 387 fits into 1301 3 times, leaving a remainder of 140.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtracting 1161 from 1301 leaves us with 140.
Grab the next digit (0) from the dividend, add it to 140, then carry on: 1400 / 387

On to step 5:
The number 387 fits into 1400 3 times, leaving a remainder of 239.
Record the quotient 3 as the next digit in the result. 
Result so far: 33.0
The remainder is 239 after subtracting 1161 from 1400.
Append the next digit (2) from the dividend to 239 and continue with: 2392 / 387

Step 6:
If we divide 2392 by 387, we get 6 and a remainder of 70.
Record the quotient 6 as the next digit in the result. 
Result so far: 336.0
If we subtract 2322 from 2392, we get 70.
Take the next digit (5) from the dividend and append it to 70, then repeat: 705 / 387

Advancing to step 7:
705 divided by 387 is 1 with a remainder of 318.
Put 1 as the next digit of the answer. 
Result so far: 3361.0
If we subtract 387 from 705, we get 318.
Take the next digit (1) from the dividend and append it to 318, then repeat: 3181 / 387

Step 8:
387 can be fit into 3181 8 times, resulting in a remainder of 85.
Write down 8 as next digit of the result. 
Result so far: 33618.0
Subtract 3096 from 3181 to get 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 9:
850 divided by 387 is 2 with a remainder of 76.
Use 2 as the next digit of our solution. 
Result so far: 33618.2
Deduct 774 from 850 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 10:
387 goes into 760 1 times with a remainder of 373.
The number 1 becomes the next digit in our result. 
Result so far: 33618.21
Subtracting 387 from 760 leaves us with 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

On to step 11:
The number 387 fits into 3730 9 times, leaving a remainder of 247.
Write down 9 as next digit of the result. 
Result so far: 33618.219
Subtracting 3483 from 3730 leaves us with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

Going ahead to step 12:
When dividing 2470 by 387, we get 6 with a remainder of 148.
Use 6 as the next digit of our solution. 
Result so far: 33618.2196
Deduct 2322 from 2470 and we're left with 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

On to step 13:
387 goes into 1480 3 times with a remainder of 319.
The number 3 becomes the next digit in our result. 
Result so far: 33618.21963
Subtracting 1161 from 1480 leaves us with 319.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3190, and continue the process.

Advancing to step 14:
The number 387 fits into 3190 8 times, leaving a remainder of 94.
Use 8 as the next digit of our solution. 
Result so far: 33618.219638
Subtracting 3096 from 3190 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

Step 15:
The number 387 fits into 940 2 times, leaving a remainder of 166.
Record the quotient 2 as the next digit in the result. 
Result so far: 33618.2196382
If we take 774 away from 940, we end up with 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Step 16:
1660 divided by 387 is 4 with a remainder of 112.
Put 4 as the next digit of the answer. 
Result so far: 33618.21963824
If we subtract 1548 from 1660, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The quotient of the division is 33618.21963824, and the remainder is 1.12e-07.