Найдите верное равенство.

• \(\dfrac {1} {3}\) ∙ \(\dfrac {3} {5}\) = \(\dfrac {1} {5}\)

• \(\dfrac {1} {3}\) ∙ \(\dfrac {3} {5}\) = \(\dfrac {4} {15}\)

• \(\dfrac {2} {7}\) ∙ 0 = \(\dfrac {2} {7}\)

• \(\dfrac {1} {3}\) ∙ 1 = \(1\dfrac {1} {3}\)