There are three groups of numbers: (1, 1, 2, 3; (2, 0.5, 1.5, 2.5, 3.5; (3, 4, 5, 6. If a number is taken from each group and multiplied, then all the different methods What is the sum of the products of the three numbers in ?
有三组数：(1,1，2，3；(2,0.5，1.5，2.5，3.5；(3,4，5，6．如果从每组数中各取出一个数相乘，那么所有不同取法的三个数乘积的总和是多少？
<gadget id="calculator">1 + 2 + 3</gadget>
<output>6</output>

<gadget id="calculator">0.5 + 1.5 + 2.5 + 3.5</gadget>
<output>8</output>

<gadget id="calculator">4 + 5 + 6</gadget>
<output>15</output>

<gadget id="calculator">6 * 8 * 15</gadget>
<output>720</output>

<result>720</result>