Children's Day shopping malls promote yoghurt buy two get one free, the original price is 3 yuan per bottle, mother paid a total of 12 yuan, so how many bottles did they actually get?
六一儿童节商场促销酸奶买二赠一，原价每瓶3元，妈妈一共付了12元，那么他们实际得到多少瓶．
<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 * (2/3)</gadget>
<output>2</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>