The human heart beats at a rate of 80 beats per minute. What is the average life span of 1,000,000 beats of a human heart?

Brief record of the problem:
in 1 minute – 80 beats,
in ? days – 1,000,000 hits.
Decision:
1) 1,000,000: 80 = 12,500 minutes;
2) in 1 hour – 60 minutes,
12500 minutes – 208 hours 20 minutes;
3) in a day – 24 hours,
208 hours 20 minutes – 8 days 16 hours 20 minutes;
4) a week – 7 days,
8 days 16 hours 20 minutes – 1 week 1 day 16 hours 20 minutes.