Divide some candies. If they are distributed to 7 children on average, one of them will lose 1 candy. If it is distributed to 9 children on average, one of them will lose 1 pill. How many candies are there at least?
分一些糖果，如果平均分给7个小朋友，其中有一个小朋友少1粒．如果平均分给9个小朋友，其中还有一个小朋友少1粒．这些糖果最少有多少粒．
<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<gadget id="calculator">63 - 1</gadget>
<output>62</output>

<result>62</result>