At noon, Dongdong has to fry a dish, cook a pot of rice, and boil a pot of water. The time for each process of cooking with a gas stove is as follows: chop vegetables for 4 minutes, prepare seasoning for 4 minutes, heat the wok for 2 minutes, heat oil for 2 minutes, and stir-fry for 4 minutes. The time for each process of heating water with a gas stove is as follows: wash the kettle for 2 minutes, boil the water for 15 minutes, and pour the boiling water into the thermos bottle for 2 minutes. The time for each process of cooking with an electric rice cooker is as follows: 4 minutes for washing rice, 18 minutes for cooking. There is only one gas stove in Dongdong's house. I would like to ask: How many minutes is the shortest time for Dongdong to finish these three things?
冬冬中午要炒一个菜，煮一锅饭，烧一壶水．用煤气炉炒菜每道工序的时间如下：切菜4分钟，准备佐料4分钟，烧热锅2分钟，烧热油2分钟，炒菜4分钟．用煤气炉烧水每道工序的时间如下：洗水壶2分钟，用火烧水15分钟，把开水灌到热水瓶中需要2分钟．用电饭锅煮饭每道工序的时间如下：淘米4分钟，煮饭18分钟．冬冬家的煤气炉只有一个煤气灶．请问：冬冬做完这三件事情最短需要多少分钟？
<gadget id="calculator">2 + 15 + 2 + 2 + 4</gadget>
<output>25</output>

<result>25</result>