Four people, A, B, C, and D, donated money to the people in the disaster-stricken area of Wenchuan. ), Ding donated 9.1 yuan. How much did the four donate in total?
甲、乙、丙、丁四人为汶川灾区人民捐款，甲捐款数额占另外三人的一半，乙捐款数额是另外三人的(1/3)，丙捐款数额是另外三人的(1/4)，丁捐了9.1元．四人共捐款多少元？
<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">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</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">(1/3) + (1/4) + (1/5)</gadget>
<output>47/60 = around 0.783333</output>

<gadget id="calculator">1 - (47/60)</gadget>
<output>13/60 = around 0.216667</output>

<gadget id="calculator">9.1 / (13/60)</gadget>
<output>42</output>

<result>42</result>