import csv

lines = []
with open('1112.csv') as f:
    reader = csv.reader(f,delimiter=' ') #suda pihaesh svoi razdelitel stolbcov iz faila
    for row in reader:
        lines.append(map(float,row))
for n,line in enumerate(lines):
    lines[n][3] *= 3
    lines[n][4] *= 3