unScale the given base number to base(bigint) unscale to the given decimals and drop the remaining decimals
unScaleToBase(69000000000000000000n, 18, 6) // 69000000nunScaleToBase(69n, 0, 0) // 69n Copy
unScaleToBase(69000000000000000000n, 18, 6) // 69000000nunScaleToBase(69n, 0, 0) // 69n
unScale the given base number to base(bigint) unscale to the given decimals and drop the remaining decimals