\begin{displaycode}{python}
a = 10
b = 15
print(a / b)
\end{displaycode}
\begin{evaluatecode}{python}
a = 10
b = 15
print(a / b)
\end{evaluatecode}
\begin{evaluatecode}{sage}
@interact
def _(n=input_box(10, label='n', width=10)):
v = [(random(), random(), random()) for _ in [1..n]]
g = sum([cube((10*a, 10*b, 10*c), size=random(), color=(a,b,c))
for a,b,c in v])
show(g)
\end{evaluatecode}