how many digits are required to number a book containing 220 pages ?
n0 = 220.0
t0 = 10.0 - 1.0
t1 = n0 - 100.0
t2 = t1 + 1.0
t3 = t0 * 10.0
t4 = t3 * 2.0
t5 = t2 * 3.0
t6 = t4 + t0
answer = t6 + t5
print(answer)