a gram of 12 C as about 602,214,790,000,000,000,000,000, they’d write 6.0221479 × 10 23 . Floating point works pretty much the same way, but in binary instead of decimal . For example, the number 13.40625 would be 1101.01101 2 (using the subscript 2 to denote a binary number), or 1.10101101 2