A kind of cake, buy 1 for 3 yuan, buy 2 for 5 yuan, buy 3 for 6 yuan. Mom brings 12 yuan, how many can you buy at most?
一种蛋糕，买1个3元，买2个5元，买3个6元．妈妈带12元钱，最多能买多少个．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<result>6</result>