Sân si tí...
Ta có: \(29\cdot\left(232+68\right)+71\cdot\left(232+29\right)\)
\(=29\cdot232+29\cdot68+71\cdot232+29\cdot71\)
\(=\left(29\cdot232+71\cdot232\right)+\left(29\cdot68+29\cdot71\right)\)
\(=232\cdot100+29\cdot139\)
\(=23200+4031\)
\(=27231\)