For this problem, we have Order Of Operations.
To do this problem, we need to follow a formula, P.E.M.D.A.S
(Please Excuse My Dear Aunt Sally)
P= Parentheses
E= Exponents
M= Multiplication
D= Division
A= Addition
S= Subtraction
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First, there are Parentheses and Exponets and Multiplication, so let’s solve.
5 x 1 = 5 and add 9 zeroes, 5,000,000,000.
Then 80 is multiplied by 5 billion.
8 x 5 = 40 and add 10 zeroes!
400 , 000 , 000 , 000.
(Four Hundred Billion)
4 x 10^11.
Hope this helps :)