π 3 ⋅ 2 ⋅ 2 ⋅ 5 ⋅ 3 ⋅ 3 π {\displaystyle {\frac {\pi }{3}}\cdot {\frac {2\cdot 2\cdot 5\cdot 3\cdot 3}{\pi }}} = 60 ∘ {\displaystyle =60^{\circ }}
