The process and time for mother to make dinner are as follows: wash the pot for 1 minute, wash rice for 2 minutes, cook porridge for 15 minutes, wash vegetables for 3 minutes, and stir-fry vegetables for 5 minutes. How many minutes does it take for mother to make this dinner at least?
妈妈做晚餐的过程及时间如下：洗锅1分钟、淘米2分钟、熬粥15分钟、洗菜3分钟、炒菜5分钟，妈妈做这顿晚餐至少需要多少分钟．
<gadget id="calculator">2 + 1 + 15</gadget>
<output>18</output>

<result>18</result>