$$3\frac{2}{6}j2\frac{1}{4}$$
$\frac{15j}{2}$
$$\frac{18+2}{6}j\times \frac{2\times 4+1}{4}$$
$$\frac{20}{6}j\times \frac{2\times 4+1}{4}$$
$$\frac{10}{3}j\times \frac{2\times 4+1}{4}$$
$$\frac{10}{3}j\times \frac{8+1}{4}$$
$$\frac{10}{3}j\times \frac{9}{4}$$
$$\frac{10\times 9}{3\times 4}j$$
$$\frac{90}{12}j$$
$$\frac{15}{2}j$$
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