A pile of peaches, 2 piles left 1, 3 piles left 1, 4 piles left 1, at least how many peaches are there in this pile?
一堆桃子，2个一堆剩1个，3个一堆剩1个，4个一堆剩1个，这堆桃子至少有多少个？
<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">12 + 1</gadget>
<output>13</output>

<result>13</result>