The IEC 61036 has been superseded by IEC 62052-11 and IEC 62053-21

The numeral 27007, or 27,007 is twenty-seven thousand and seven.

From ISO/IEC 7813 these cards are 0.76 mm or 0.030 inches thick.

C++ doesn't have versions, it has standards. The implementations of those standards have versions, but the version numbering differs from one implementation to another. The current standard (as of 6th February 2017) is ISO/IEC 14882:2014.

There are 43,560 square feet in 1 acre. Therefore, rounded to three decimal places, 27007 square feet is equal to 27007/43560 = 0.620 acres.