Answer:
3.4 x 10⁻² kg · m²/s²
Explanation:

The numerator is in g.cm² and the denominator is the same s²
So we only need to convert the numerator from g.cm² to kg.m²
1 kg = 1000 grams = 10³ grams
1 gm = 1/10³ kg
1 gm = 10⁻³ kg
1 m = 100 cm = 10² cm
1 m² = 100² cm² = (10²)² = 10⁴ cm²
Or 1 cm² = 1/10⁴ cm² = 10⁻⁴ cm²
Therefore to convert g · cm² to kg · m² we multiply by
(10⁻³) · (10⁻⁴) = 10⁻⁷
Therefore 3.4 x 10⁵ g · cm² = 3.4 x 10⁵ x 10⁻⁷ kg · m²
= 3.4 x 10⁻² kg · m²/s²