Calculating Energy Released from Uranium Fission

[estiy]

Homework Statement

a mass of 3.33x10^-28kg of uranium is converted into energy during nuclear fission (exploding) according to einstein's formula

E=mc^2
where energy is measured in joules (J), m is measured in kg and c = 3000000000m/s is the speed of light

Homework Equations

show that the amount of energy released during fission is 2.997x10^-1 J

The Attempt at a Solution

E = mc^2
= 28kg x (3x10^8ms^-1)^2
= 28kg x (3x10^8ms^-1)x(3x10^8ms^-1)
= 28kg (9x10^16m^2s^-2)
= 28 x (9x10^16)kg m^2s^-2
= 252 x 10^16 J
= 2,520,000,000,000,000

thats my attempt.. i know nothing about this stuff and i was trying to do this for a friend.. I am curious now what others come up with

 

[Gregg]

$m = 3.33\times 10^{-28}$

$c = 3\times 10^8$

$E = mc^2$

$E = (3.33\times 10^{-28})(3\times 10^8)^2 = 2.997\times 10^{-11}$