There is a bag of candy distributed among 12 children, 16 children and 20 children on average, and the result is that there are 3 pieces left. How many pieces of this bag of candy are at least?
有一包糖平均分给12个小朋友、16个小朋友和20个小朋友，结果都剩下3块，这包糖至少有多少块？
<gadget id="calculator">2 * 2 * 2 * 2 * 3 * 5</gadget>
<output>240</output>

<gadget id="calculator">240 + 3</gadget>
<output>243</output>

<result>243</result>