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 Step 7:
Multiply the divisor by the result in the previous step (2 x 5 = 10) and
write that answer at the bottom:

 Step 8:
Subtract the result in the previous step from the number written
above it. (10 - 10 = 0) and write the answer at the bottom.

You are done, because there are no more digits to move down from
the dividend.
The answer is the top number and the remainder is the bottom
number.
Therefore, the answer to 30 divided by 2 calculated using Long
Division is:
15 Here, 15 is your Quotient.
0 Remainder

You can also check whether your answer is correct or not by using
this formula:
Dividend = divisor X Quotient + Remainder or D = d X Q + R