Is there any point in this question - apart from a pointless exercise in multiplication? The entire life span of the solar system is far less than that. In around one hundredth of the period the earth will cease to exist. No earth means nothing to orbit the sun in a year: so no year! In the meantime, the earth's orbit is slowing down so a year in 1000000 years' time will be many more seconds longer than it is now.
But, pontless though it is, the question was asked so the answer is approx 315576000000000000000 seconds.
1 x 10^13 years = 3.15576 x 10^20 seconds
10000000000000 = 1013
About 1,009,843,200 seconds in 32 years.
20 years = 631,138,519 seconds.
25 years = 788,923,149 seconds.
10 years = 315,569,260 seconds.
10000000000000
3% of 10000000000000 = 3% * 10000000000000 = 0.03 * 10000000000000 = 300,000,000,000
10000000000000 = 10,000,000,000,000
1/3 every two years
10000000000000 = 1013
4-10000000000000 = -9999999999996
10000000000000-3747577 = 9999996252423
10000000000000
100 + 10000000000000 = 10000000000100
There are 1263141040 seconds in 40 years
10 years = 315,569,260 seconds.
18 years is about 568,036,800 seconds.