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\frac{80 \cdot 98 \cdot 0.19556579719223724}{100}
Evaluate trigonometric functions in the problem
\frac{7840\times 0.19556579719223724}{100}
Multiplica 80 e 98 para obter 7840.
\frac{1533.2358499871399616}{100}
Multiplica 7840 e 0.19556579719223724 para obter 1533.2358499871399616.
\frac{15332358499871399616}{1000000000000000000}
Expande \frac{1533.2358499871399616}{100} multiplicando o numerador e o denominador por 10000000000000000.
\frac{239568101560490619}{15625000000000000}
Reduce a fracción \frac{15332358499871399616}{1000000000000000000} a termos máis baixos extraendo e cancelando 64.