Distribute all the candies to three children A, B, and C. The ratio of the number of candies obtained by the original plan A, B, and C is 5:4:3. In fact, the ratio of the number of candies obtained by A, B, and C is 7:6:5, and one of the children got 15 more candies than originally planned. So who is this kid? How many pieces of candy did he actually get?
将一堆糖果全部分给甲、乙、丙三个小朋友．原计划甲、乙、丙三人所得糖果数的比为5：4：3．实际上，甲、乙、丙三人所得糖果数的比为7：6：5，其中有一位小朋友比原计划多得了15块糖果．那么这位小朋友是谁？他实际所得的糖果数为多少块？
<gadget id="calculator">7 + 6 + 5</gadget>
<output>18</output>

<gadget id="calculator">5 / 18</gadget>
<output>5/18 = around 0.277778</output>

<gadget id="calculator">3 + 4 + 5</gadget>
<output>12</output>

<gadget id="calculator">3 / 12</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(5/18) - (1/4)</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">15 / (1/36)</gadget>
<output>540</output>

<gadget id="calculator">540 * (5/18)</gadget>
<output>150</output>

<result>150</result>