Answer :

[tex] \frac{21}{3} * \frac{41}{2} = \frac{21*41}{3*2} = \frac{861}{6} = \frac{3*287}{3*2} = \frac{287}{2} [/tex]
[tex] \frac{21}{3} * \frac{41}{2} = \frac{861}{6} = 143.5 [/tex]

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