4. Найдите значение выражения \(\left(1\frac{8}{15}-2\frac{1}{3}\right)\cdot36\).

\[1\frac{8}{15}=\frac{23}{15},\qquad 2\frac{1}{3}=\frac{7}{3}=\frac{35}{15}.\]

\[\left(\frac{23}{15}-\frac{35}{15}\right)\cdot36=-\frac{12}{15}\cdot36=-\frac{4}{5}\cdot36=-\frac{144}{5}=-28\frac{4}{5}.\]

Ответ: \(-28\frac{4}{5}\).