A couple of years ago my sister Judy and I were each given a box of truffles. The tiny print said two pieces contained 310 calories and there were six pieces in each box. We were sitting on the bus headed downtown, quietly doing our calculations: Judy was dividing by two and I was multiplying by three. When she realized what I was doing, a look came over her face that is hard to describe. 'I lost all hope for you' she says now.