Find the product :
8121×11138\dfrac{1}{21} \times 1\dfrac{1}{13}8211×1131
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⇒8121×1113⇒16921×1413⇒16913×1421⇒13×23⇒263⇒823.\Rightarrow 8\dfrac{1}{21} \times 1\dfrac{1}{13}\\[1em] \Rightarrow \dfrac{169}{21} \times \dfrac{14}{13}\\[1em] \Rightarrow \dfrac{169}{13} \times \dfrac{14}{21} \\[1em] \Rightarrow 13 \times \dfrac{2}{3} \\[1em] \Rightarrow \dfrac{26}{3} \\[1em] \Rightarrow 8\dfrac{2}{3}.⇒8211×1131⇒21169×1314⇒13169×2114⇒13×32⇒326⇒832.
Hence, 8121×1113=8238\dfrac{1}{21} \times 1\dfrac{1}{13} = 8\dfrac{2}{3}8211×1131=832.
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