Bài 1

def tinh_dien_tich(dai, rong):
    return dai * rong

def tinh_chu_vi(dai, rong):
    return 2 * (dai + rong)

dai  = float(input("Nhap chieu dai: "))
rong = float(input("Nhap chieu rong: "))

dt = tinh_dien_tich(dai, rong)
cv = tinh_chu_vi(dai, rong)

print(f"Dien tich = {dt}")
print(f"Chu vi    = {cv}")