There are 22 boxes containing table tennis balls. If there are at least 4 boxes with the same number of table tennis balls no matter how they are loaded (the number of table tennis balls in the boxes is not counted as 0), then how many table tennis balls are contained in the box with the most balls.
有22个装乒乓球的盒子，如果不管怎么装都至少有4个盒子里的乒乓球数相同(不装算0个)，那么装球最多的盒子中装有多少个乒乓球．
<gadget id="calculator">22 - 3 - 1</gadget>
<output>18</output>

<gadget id="calculator">18 / 3</gadget>
<output>6</output>

<result>6</result>