Three people share a bag of sugar equally. After each person has eaten 12 yuan, the total number of pieces left by the three people is the same as the initial share of each person. How much is this bag of candy?
三个人平均分一包糖．每人吃了12块以后，三人剩下的总块数与每人开始分得的一样多．这包糖原来有多少块．
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<result>54</result>