Resposta:
[tex] \blue{ \large \boxed{ \boxed{ \red{ \tt\frac{5}{14} }}}}[/tex]
Explicação passo-a-passo:
[tex] \blue{ \large{ \boxed{ \boxed{ \pink{ \tt \frac{5}{6} \times \frac{3}{7} = \frac{5 \times 3}{6 \times 7} = \frac{15}{42} = \frac{5 \times\diagup\!\!\!{3}}{14 \times \diagup\!\!\!{3}} = \red{ \frac{5}{14}}}}}}}[/tex]
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[tex] \blue{\boxed{ \boxed{ \pink{ \text{ \tt duvidas \: deixe \: nos \: comentarios}}}}}[/tex]
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[tex] \blue{\large \boxed{ \boxed{ \orange{\tt espero \: ter \: ajudado }}}}[/tex]
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[tex] \blue{\large \boxed{ \boxed{ \green{ \tt bons \:estudos}}}}[/tex]
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[tex] \blue{\large \boxed{\boxed{ \pink{ \large \tt ASS =>> Starco \: \: Butterdiaz}}}}[/tex]