We divide 39218185 by 210
The aim is to understand the frequency of 210 in 39218185.

Advancing to step 1:
If we divide 3 by 210, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 210

On to step 2:
When dividing 39 by 210, we get 0 with a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 39 leaves us with 39.
Fetch the next digit (2) from the dividend, attach it to 39 and continue: 392 / 210

Let's proceed to step 3:
210 can be fit into 392 1 times, resulting in a remainder of 182.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 182 after subtracting 210 from 392.
Take the next digit (1) from the dividend and append it to 182, then repeat: 1821 / 210

Let's proceed to step 4:
1821 divided by 210 is 8 with a remainder of 141.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
If we take 1680 away from 1821, we end up with 141.
Append the next digit (8) from the dividend to 141 and continue with: 1418 / 210

Advancing to step 5:
1418 divided by 210 is 6 with a remainder of 158.
Use 6 as the next digit of our solution. 
Result so far: 186.0
If we take 1260 away from 1418, we end up with 158.
Include the next digit (1) from the dividend after 158, then repeat: 1581 / 210

Advancing to step 6:
The number 210 fits into 1581 7 times, leaving a remainder of 111.
Record the quotient 7 as the next digit in the result. 
Result so far: 1867.0
Subtracting 1470 from 1581 leaves us with 111.
Fetch the next digit (8) from the dividend, attach it to 111 and continue: 1118 / 210

Advancing to step 7:
210 goes into 1118 5 times with a remainder of 68.
The next digit of our result is 5. 
Result so far: 18675.0
The remainder is 68 after subtracting 1050 from 1118.
Fetch the next digit (5) from the dividend, attach it to 68 and continue: 685 / 210

Moving on to step 8:
The number 210 fits into 685 3 times, leaving a remainder of 55.
Write down 3 as next digit of the result. 
Result so far: 186753.0
Subtract 630 from 685 to get 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

Going ahead to step 9:
If we divide 550 by 210, we get 2 and a remainder of 130.
The next digit of our result is 2. 
Result so far: 186753.2
Subtracting 420 from 550 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Step 10:
The number 210 fits into 1300 6 times, leaving a remainder of 40.
The next digit of our result is 6. 
Result so far: 186753.26
Deduct 1260 from 1300 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 11:
400 divided by 210 is 1 with a remainder of 190.
Write down 1 as next digit of the result. 
Result so far: 186753.261
The remainder is 190 after subtracting 210 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 12:
The number 210 fits into 1900 9 times, leaving a remainder of 10.
Record the quotient 9 as the next digit in the result. 
Result so far: 186753.2619
Subtracting 1890 from 1900 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 13:
The number 210 fits into 100 0 times, leaving a remainder of 100.
Record the quotient 0 as the next digit in the result. 
Result so far: 186753.2619
Subtracting 0 from 100 leaves us with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Advancing to step 14:
The number 210 fits into 1000 4 times, leaving a remainder of 160.
The next digit of our result is 4. 
Result so far: 186753.261904
If we subtract 840 from 1000, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 15:
210 goes into 1600 7 times with a remainder of 130.
The number 7 becomes the next digit in our result. 
Result so far: 186753.2619047
Subtracting 1470 from 1600 leaves us with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Going ahead to step 16:
If we divide 1300 by 210, we get 6 and a remainder of 40.
Use 6 as the next digit of our solution. 
Result so far: 186753.26190476
The remainder is 40 after subtracting 1260 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 186753.26190476 and a remainder of 4e-08.