The sum of the four numbers A, B, C, and D is 480, where A is the sum of B, C, and D (1/2), B is the sum of A, C, and D (1/3), and C is A, B, D and (1/4). How much is Qiuding?
甲、乙、丙、丁四个数的和是480，其中甲是乙、丙、丁的和的(1/2)，乙是甲、丙、丁的和的(1/3)，丙是甲、乙、丁的和的(1/4)．求丁是多少？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">480 * (1/3)</gadget>
<output>160</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

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

<gadget id="calculator">480 * (1/4)</gadget>
<output>120</output>

<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">480 * (1/5)</gadget>
<output>96</output>

<gadget id="calculator">480 - 160 - 120 - 96</gadget>
<output>104</output>

<result>104</result>