Let's divide 30243086 by 210
Our goal is to divide 30243086 by 210.

Step 1:
210 goes into 3 0 times with 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.
Grab the next digit (0) from the dividend, add it to 3, then carry on: 30 / 210

Advancing to step 2:
When dividing 30 by 210, we get 0 with a remainder of 30.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 30 to get 30.
Append the next digit (2) from the dividend to 30 and continue with: 302 / 210

Step 3:
The number 210 fits into 302 1 times, leaving a remainder of 92.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 92 after subtracting 210 from 302.
Bring next digit (4) of the dividend behind the 92 and repeat the process: 924 / 210

Advancing to step 4:
210 goes into 924 4 times with a remainder of 84.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 840 from 924 to get 84.
Include the next digit (3) from the dividend after 84, then repeat: 843 / 210

Advancing to step 5:
When dividing 843 by 210, we get 4 with a remainder of 3.
The next digit of our result is 4. 
Result so far: 144.0
Subtract 840 from 843 to get 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 210

Let's proceed to step 6:
When dividing 30 by 210, we get 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 1440.0
The remainder is 30 after subtracting 0 from 30.
Fetch the next digit (8) from the dividend, attach it to 30 and continue: 308 / 210

Advancing to step 7:
If we divide 308 by 210, we get 1 and a remainder of 98.
The number 1 becomes the next digit in our result. 
Result so far: 14401.0
Subtracting 210 from 308 leaves us with 98.
Fetch the next digit (6) from the dividend, attach it to 98 and continue: 986 / 210

Advancing to step 8:
When dividing 986 by 210, we get 4 with a remainder of 146.
The number 4 becomes the next digit in our result. 
Result so far: 144014.0
The remainder is 146 after subtracting 840 from 986.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Going ahead to step 9:
210 goes into 1460 6 times with a remainder of 200.
Use 6 as the next digit of our solution. 
Result so far: 144014.6
The remainder is 200 after subtracting 1260 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Moving on to step 10:
If we divide 2000 by 210, we get 9 and a remainder of 110.
Record the quotient 9 as the next digit in the result. 
Result so far: 144014.69
Deduct 1890 from 2000 and we're left with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Going ahead to step 11:
1100 divided by 210 is 5 with a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 144014.695
If we take 1050 away from 1100, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 12:
500 divided by 210 is 2 with a remainder of 80.
Use 2 as the next digit of our solution. 
Result so far: 144014.6952
If we take 420 away from 500, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 13:
If we divide 800 by 210, we get 3 and a remainder of 170.
Record the quotient 3 as the next digit in the result. 
Result so far: 144014.69523
Subtracting 630 from 800 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Moving on to step 14:
210 goes into 1700 8 times with a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 144014.695238
Subtracting 1680 from 1700 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 15:
210 can be fit into 200 0 times, resulting in a remainder of 200.
Use 0 as the next digit of our solution. 
Result so far: 144014.695238
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 16:
The number 210 fits into 2000 9 times, leaving a remainder of 110.
Use 9 as the next digit of our solution. 
Result so far: 144014.69523809
Subtracting 1890 from 2000 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

In conclusion, the division gives 144014.69523809 with a balance of 1.1e-07.