Evaluate
30.4
Factor
\frac{19 \cdot 2 ^ {3}}{5} = 30\frac{2}{5} = 30.4
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\frac{3\times \frac{15+1}{3}}{\frac{4}{7}}+2.4
Multiply 5 and 3 to get 15.
\frac{3\times \frac{16}{3}}{\frac{4}{7}}+2.4
Add 15 and 1 to get 16.
\frac{16}{\frac{4}{7}}+2.4
Cancel out 3 and 3.
16\times \frac{7}{4}+2.4
Divide 16 by \frac{4}{7} by multiplying 16 by the reciprocal of \frac{4}{7}.
\frac{16\times 7}{4}+2.4
Express 16\times \frac{7}{4} as a single fraction.
\frac{112}{4}+2.4
Multiply 16 and 7 to get 112.
28+2.4
Divide 112 by 4 to get 28.
30.4
Add 28 and 2.4 to get 30.4.
Examples
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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699 * 533
Matrix
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Simultaneous equation
\left. \begin{cases} { 8x+2y = 46 } \\ { 7x+3y = 47 } \end{cases} \right.
Differentiation
\frac { d } { d x } \frac { ( 3 x ^ { 2 } - 2 ) } { ( x - 5 ) }
Integration
\int _ { 0 } ^ { 1 } x e ^ { - x ^ { 2 } } d x
Limits
\lim _{x \rightarrow-3} \frac{x^{2}-9}{x^{2}+2 x-3}