((7.820 x (5.05)3 divided by (944)2 x 11.7)3) square root

Answer 1

I'll assume that things like (5.05)3 mean exponents, like 5.05^3
If so, then you have
√((7.820 * (5.05)^3 / (944^2 * 11.7)^3) = 8.89*10^-19

If not, then type your expression in at wolframalpha.com and
(a) use * for multiplication, not x
(b) fix the parentheses until wolframalpha interprets your expression correctly