First, start out by inserting the numbers:
3.14(4(2) (4^2) + 4(2)
Next, multiply the given numbers:
3.14(8 (4^2) + 8)
Then, multiply 4^2 (since the exponent is 2, multiply 4 two times: 4 * 4):
3.14(8 (16) + 8)
Now, multiply the first 8 to 16:
3.14(128 + 8)
Use the distributive property to solve this next one:
401.92 + 25.12
Finally, add up you two decimals:
427.04
You should get 427.04 (I could be wrong though).
Hopefully that helped! :)
