251021 ÷ 30 
We're looking to find how many times 30 goes into 251021.

Step 1:
30 can be fit into 2 0 times, resulting in a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 30

Let's proceed to step 2:
25 divided by 30 is 0 with a remainder of 25.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Fetch the next digit (1) from the dividend, attach it to 25 and continue: 251 / 30

Going ahead to step 3:
When dividing 251 by 30, we get 8 with a remainder of 11.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 240 from 251, we get 11.
Grab the next digit (0) from the dividend, add it to 11, then carry on: 110 / 30

Going ahead to step 4:
When dividing 110 by 30, we get 3 with a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
Subtracting 90 from 110 leaves us with 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 30

Advancing to step 5:
If we divide 202 by 30, we get 6 and a remainder of 22.
The next digit of our result is 6. 
Result so far: 836.0
Deduct 180 from 202 and we're left with 22.
Take the next digit (1) from the dividend and append it to 22, then repeat: 221 / 30

Step 6:
When dividing 221 by 30, we get 7 with a remainder of 11.
Use 7 as the next digit of our solution. 
Result so far: 8367.0
Subtracting 210 from 221 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 7:
The number 30 fits into 110 3 times, leaving a remainder of 20.
Record the quotient 3 as the next digit in the result. 
Result so far: 8367.3
The remainder is 20 after subtracting 90 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 8:
30 goes into 200 6 times with a remainder of 20.
The number 6 becomes the next digit in our result. 
Result so far: 8367.36
Subtract 180 from 200 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 9:
When dividing 200 by 30, we get 6 with a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 8367.366
Subtracting 180 from 200 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.

The final outcome is 8367.366, with a leftover of 0.002.