Distribute a bunch of candies to several children. If each person has 2 yuan, there will be 12 yuan left; if each person has 3 yuan, there will be 5 yuan left. How many children are there in total?
把一堆糖果分给几位小朋友，若每人2块，将剩余12块；每人3块，将缺少5块，那么小朋友共多少位．
<gadget id="calculator">12 + 5</gadget>
<output>17</output>

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

<gadget id="calculator">17 / 1</gadget>
<output>17</output>

<result>17</result>