import math
def roundToNearest5(num):
return math.floor(num / 5) * 5
print(roundToNearest5(13))
print(roundToNearest5(14))
print(roundToNearest5(16))
print(roundToNearest5(7))
print(roundToNearest5(3))
print(roundToNearest5(4))
print(roundToNearest5(5))
print(roundToNearest5(-1))
print(roundToNearest5(-9))
'''
run:
10
10
15
5
0
0
5
-5
-10
'''