Can 0.0000000062715585 be rounded to zero? What about 0.01?
Yes.
0.0000000062715585 corrected to 1 dp = 0
0.0000000062715585 corrected to 2 dp = 0
......
0.0000000062715585 corrected to 7 dp= 0
0.0000000062715585 corrected to 8 dp= 0.00000001
0.01 corrected to 1dp = 0