\[ a = -3 \cdot (-13) = 39 \]
\[ b = a \cdot (-0.1) = 39 \cdot (-0.1) = -3.9 \]
\[ c = b \cdot (-2) = -3.9 \cdot (-2) = 7.8 \]
\[ d = \frac{1}{3} \cdot c = \frac{1}{3} \cdot 7.8 = 2.6 \]
Ответ: d = 2.6