If it's not what You are looking for type in the equation solver your own equation and let us solve it.
7.5*(1/3)^3.14*22^2
7.5*484*(1/3)^3.14
3630*(1/3)^3.14
115.2778374
| -7(x+6)=-4(4-5x)+1 | | 5x+45=9x-35 | | x+3*4=48 | | 13x+4=-8 | | x^2-2x^2+y^2+z^2=0 | | 5*31=40+4*31-9 | | -4x+3=4x+99 | | 3(2y-4)-y=5 | | (1/3)3.14*11^2*7.5 | | (4*5)*3= | | x^2+16z^2-4y^2+16=0 | | 7x-7=5+3x | | x^2-3x=x^2-x-25 | | 3x-7=41-3x | | 1=-5-3(4x-6) | | 4x(3)-105=0 | | -2+6x=28 | | x^2-y^2+z^2=0 | | (4w-4)(3w+2w+6)= | | 4x^2+9y^2+z^2=36 | | 6-8(x+3)=10 | | k^2=-15 | | 8(m+7)=7m+6(m+6) | | 28=u+6u | | z+3+4x=23 | | x^2-2ax+3a=0 | | 5y-13=367 | | Y^2=0.64 | | 3a+4b=18cb | | 50=3.1x | | 9m+6=97 | | 4^(1/5)*3^(2/5)=y^(1/5) |