The community canteen stipulates that every 3 empty soda bottles can be exchanged for a bottle of soda. If Li Ming buys 6 bottles of soda and each person drinks one bottle, how many partners can he drink at most?
小区小卖部规定：每3个空汽水瓶可以换一瓶汽水，李明如果买6瓶汽水，每人喝一瓶的话，他最多可以给多少个伙伴喝．
<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">6 + 2 + 1</gadget>
<output>9</output>

<result>9</result>