Mom cooks and cooks, washes and cuts vegetables for 5 minutes, cooks for 8 minutes, washes rice for 2 minutes, and steams rice for 13 minutes. How much time does mother spend at least cooking and cooking?
妈妈煮菜做饭，洗菜和切菜共5分钟，煮菜8分钟，淘米2分钟，蒸米饭13分钟，妈妈最少要花多少时间煮好菜、做好饭．
<gadget id="calculator">2 + 5 + 8</gadget>
<output>15</output>

<result>15</result>