There is a pile of apples, no matter if it is distributed to 7 people or 9 people, there is exactly one left. How many apples are there at least?
有一堆苹果，无论分给7人还是9人，都正好剩一个，这些苹果最少有多少个？
<gadget id="calculator">7 * 9</gadget>
<output>63</output>

<gadget id="calculator">63 + 1</gadget>
<output>64</output>

<result>64</result>