If it takes one second to count two rice grains, calculate the time in years required to count a mole of rice grainrg.

Mole is 6,022*10^23

6,022 * 10^23 / 2 (here are seconds) then / 60 (minutes), then / 60 (hours) / 24 (days), then / 365 (year) equals 9547818366311516,9965 years

every 4 years there's one day more in a year, so 9547818366311516,9965 / 4 (here are days) then / 365 = 6539601620761,31 years less.

the answer is 9547818366311516,9965 - 6539601620761,31 = 9541278764690755,6865 years to calculate the rice