Evaluate
81000\pi \approx 254469.004940773
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\pi \times 3600\times \frac{90}{4}
Calculate 60 to the power of 2 and get 3600.
\pi \times 3600\times \frac{45}{2}
Reduce the fraction \frac{90}{4} to lowest terms by extracting and canceling out 2.
\pi \times \frac{3600\times 45}{2}
Express 3600\times \frac{45}{2} as a single fraction.
\pi \times \frac{162000}{2}
Multiply 3600 and 45 to get 162000.
\pi \times 81000
Divide 162000 by 2 to get 81000.
Examples
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{ x } ^ { 2 } - 4 x - 5 = 0
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4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
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699 * 533
Matrix
\left[ \begin{array} { l l } { 2 } & { 3 } \\ { 5 } & { 4 } \end{array} \right] \left[ \begin{array} { l l l } { 2 } & { 0 } & { 3 } \\ { -1 } & { 1 } & { 5 } \end{array} \right]
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}