If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a=3.14*2^2
We move all terms to the left:
a-(3.14*2^2)=0
We add all the numbers together, and all the variables
a-12.56=0
We move all terms containing a to the left, all other terms to the right
a=12.56
| g+24=7 | | a=3.14*10^2 | | -15.4w=-16.48-17w | | 9-19z=-17z-3z-11 | | a=3.14*4^2 | | (x+5)/4=(9-x)/x | | 4(1/2x+6)=-2(×-24) | | 16k=20k-12 | | 2x+2=-4x+10 | | x+5/4=9-x/x | | 5(-2x-5)+2x=15 | | -12r-12.41=-16.33-14.8r | | 16=d-14 | | 20-20p=20+16-19p | | -4(-2x-7)=12 | | 6x-16-14x-1=6x-12x+1 | | 18+23+3y-21=180 | | 8x+13+33=70 | | 12b+20=-8b | | a=3.14*3^2 | | 4(2x+3)=3(x-2) | | 2x+5=101 | | 19.15+1.8j=-19.46-11.1j+9.6j | | (v+8)(v+1)=0 | | 2x+52=502 | | w/3=-45 | | 3(3x-20)=39 | | 3x-17-2x+3=25 | | x+3.14=0.5(2x+6.28) | | |2c=8|=10c | | x/3+2x/5=1/5 | | -7.4u-8=-6.6u |