Evaluate
20
Factor
2^{2}\times 5
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\lfloor \frac{1391}{68}\rfloor
Reduce the fraction \frac{11128}{544} to lowest terms by extracting and canceling out 8.
\lfloor 20+\frac{31}{68}\rfloor
Dividing 1391 by 68 gives 20 and remainder 31. Rewrite \frac{1391}{68} as 20+\frac{31}{68}.
20
The floor of a real number a is the largest integer number less than or equal to a. The floor of 20+\frac{31}{68} is 20.
Examples
Quadratic equation
{ x } ^ { 2 } - 4 x - 5 = 0
Trigonometry
4 \sin \theta \cos \theta = 2 \sin \theta
Linear equation
y = 3x + 4
Arithmetic
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}