The task is to generate the correct answer for a given math 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 ?
1

Problem: a cistern 5 m long and 4 m wide contains water up to a depth of 1 m 25 cm . the total area of the wet surface is :
42.5 m 2

Problem: how many positive integers less than 100 have a remainder of 3 when divided by 13 ?