I need help in example 2 reading 8 from the CFAI.

where it says ¨Because Size__{i}_{,}_{t}_ is the natural (base *e* or 2.72) log of sales, an increase of 1 in Size__{i}_{,}_{t}_ is the same as a 2.72-fold increase in sales. Thus, the estimated coefficient of approximately –0.7 for Size__{i}_{,}_{t}_ implies that every 2.72-fold increase in sales of the MNC (an increase of 1 in Size__{i}_{,}_{t}*) is associated with an expected decrease of 0.7 in Tobin’s q_{i}_{,}*

_{t}_ of the MNC,

*holding constant the other five independent variables in the regression*.¨

I can`t get the 2.72 and its driving me crazy. please help me. thanks!