### ex4-1 ###

a = 3.1
b = 2.2
c = a * b * b
print(c)



### ex4-2 ###

pi = 3.1
radius = 2.2

# 使用公式計算圓面積
circle_area = pi * radius * radius
print(circle_area)



### ex4-3 ###

minutes_to_convert = int(input('Enter minutes: '))



### ex4-4 (4-1.py) ###

minutes_to_convert = int(input('Enter minutes: '))	# 輸入欲轉換的分鐘數

hours_decimal = minutes_to_convert / 60			# 分鐘數轉換為小數，例如：2.05
hours_part = int(hours_decimal)				# 取整數部分為小時，例如：int(2.05) = 2

minutes_decimal = hours_decimal - hours_part		# 取得小數點部分
minutes_part = round(minutes_decimal * 60)		# 將小數點部分還原分鐘數
print('Hours')
print(hours_part)
print('Minutes')
print(minutes_part)



### ex4-5 (4-2-clock converter.py) ###

"""
    4-2-clock converter.py
    ------------------------
    Creates a clock converter.
    The converter transfers minutes to hours part and minutes part.
"""
minutes_to_convert = int(input('Enter minutes: '))

# 轉換小時數
hours_decimal = minutes_to_convert / 60
hours_part = int(hours_decimal)

# 轉換分鐘數
minutes_part = minutes_to_convert % 60

print('Hours')
print(hours_part)
print('Minutes')
print(minutes_part)