add ln(8) and ln(8)
Let's calculate: ln(8) + ln(8)
2×ln(8)
ln(8) = 3×ln(2)
2×3×ln(2)
2×3 = 6
6×ln(2)
The approximate value of: 6×ln(2) is:
6×0.6931
4.1589
Result:   6×ln(2)
▷▷Numeric value:  4.1589