Two monkeys, big and small, found a bunch of peaches. The big monkey ate half of them first, then the little monkey ate the remaining half, and finally there were 7 left. How many peaches were there in total?
有大小两只猴发现了一堆桃．大猴先吃了其中的一半，接着小猴吃了剩下的一半，最后还余下7个．原来一共有多少个桃？
<gadget id="calculator">7 * 2 * 2</gadget>
<output>28</output>

<result>28</result>