Question 596531
In terms of units:
( beats/minute) x ( minutes/hour) x ( hours/day ) x ( days/year ) x ( years/lifetime ) = beats/lifetime
{{{ 70*60*24*365*80 = 2943360000 }}}
{{{ 2943360000 = 2.94336*10^9 }}}
rounded off:
{{{ 2.94*10^9 }}}