The number of laughs (denoted by $L$) can be defined as a function of the number of jokes (denoted by $J$), the amount of knowledge about the joke material (denoted by $K$), and the familiarity with the jokes (denoted by $F$) using this formula: $L = \dfrac{J\cdot K^2}{F}$ **Select an appropriate measurement unit for number of laughs.** [[☃ radio 1]]