You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: Lena drove 204 miles . Using 10 gallons of gas at this rate , how many gallons of gas would she need to drive 255 miles ?
[EX A]: 12.5

[EX Q]: Last Saturday , Spencer walked all over town running errands . First , he walked 0.3 mile from his house to the library and 0.1 mile from the library to the post office . Then he walked 0.4 mile from the post office back home . How many miles did Spencer walk in all ?
[EX A]: 0.8

[EX Q]: After eating at the restaurant , Sally , Sam , and Alyssa decided to divide the bill evenly . If each person paid 45 dollars , what was the total of the bill ?
[EX A]:
135