Mother prepares breakfast on Friday morning: wash rice for 2 minutes, cook porridge in a rice cooker for 18 minutes, fry eggs for 5 minutes, stir-fry vegetables for 8 minutes, and serve porridge for 1 minute. How many minutes does it take for mother to prepare this breakfast at least?
星期五早上妈妈准备早餐：淘米2分钟，用电饭煲煮粥18分钟，煎鸡蛋5分钟，炒菜8分钟，盛粥1分钟，妈妈准备这顿早餐至少需要多少分钟．
<gadget id="calculator">2 + 18 + 1</gadget>
<output>21</output>

<result>21</result>