TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: in a new housing development , trees are to be planted along the sidewalk of a certain street . each tree takes up one square foot of sidewalk space , and there are to be 9 feet between each tree . how many trees can be planted if the road is 151 feet long ?

SOLUTION: 1

PROBLEM: Problem: how many zeroes are there at the end of the number n , if n = 70 ! + 140 ! ?

SOLUTION: 16

PROBLEM: Problem: which greatest possible length can be used to measure exactly 15 meter 20 cm , 12 meter 20 cm and 14 meter 20 cm

SOLUTION:
20 cm