− 5 π 4 ⋅ 180 ∘ π = π ⋅ 2 ⋅ 2 ⋅ 3 ⋅ 5 1 ⋅ π 2 ⋅ 2 ⋅ 5 ⋅ 3 ⋅ 3 {\displaystyle {\frac {-5\pi }{4}}\cdot {\frac {180^{\circ }}{\pi }}={\frac {{\cancel {\pi }}\cdot {\cancel {2}}\cdot 2\cdot {\cancel {3}}\cdot {\cancel {5}}}{1}}\cdot {\frac {\pi }{{\cancel {2}}\cdot {\cancel {2}}\cdot {\cancel {5}}\cdot {\cancel {3}}\cdot 3}}}
