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 Input:
stanley a car enthusiast loves to drive across different places as a hobby . so for his vacation he decided to go around his favorite places . his first destination is the famous sky falls 1 of the tallest waterfalls in his country . it is said to be 20 times as tall as the tallest building in their city . if the building is 9 feet tall how tall is sky falls ?

Ex Output:
180


Ex Input:
at the store beef jerky was $ 34.23 for 3 pounds . if you bought 7 pounds how much would it cost ?

Ex Output:
79.87


Ex Input:
a bus can transport 48 passengers . if a school of 1230 students and teachers are going on a field trip how many buses should be rented ?

Ex Output:

25.625