\(\frac{3}{5}.\frac{4}{7}.1.\frac{1}{2}\)
\(=\frac{3.4.1.1}{5.7.1.2}\)
\(=\frac{12}{70}\)
\(=\frac{12:2}{70:2}=\frac{6}{35}\)
\(\frac{3}{5}x\frac{4}{7}x1\frac{1}{2}\)
\(=\frac{3}{5}x\frac{4}{7}x\frac{3}{2}\)
\(=\frac{12}{35}x\frac{3}{2}\)
\(=\frac{18}{35}\)