After the culmination of the movie, when Katya performed her rebellion in a form of the silly goat song and the consumerist dream, she ran out in the street crying. Ivan followed her there and tried to calm down. While they were sitting outside for about a minute Ivan calculated that with the average pulse of 70 beats a minute and the average lifespan of 70 years, our heart beats 2 575 440 000 times. So, he and Katya have already covered about 600 million beats. The point of these calculations in that specific time, when Katya was thinking about how to live further, don’t appear quite obvious. Perhaps Ivan was also thinking about the meaning of life, but in his own, unique way or just trying to take Katya’s attention away from what she considered a problem.