A, B, C, and D donate money to a certain disaster area. A’s donation is (1/3) of the total donations of the other three people, B’s donation is (1/5) of the other three people’s total donations, and C’s The number of donations is 1/6 of the total donations of the other three people, and Ding donated 148 yuan. How much did A donate?
甲、乙、丙、丁四人向某灾区捐款，甲的捐款数是其他三人捐款总数的(1/3)，乙的捐款数是其他三人捐款总数的(1/5)，丙的捐款数是其他三人捐款总数的(1/6)，丁捐款148元．甲捐了多少元？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">6 + 1</gadget>
<output>7</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 - (1/4) - (1/6) - (1/7)</gadget>
<output>37/84 = around 0.440476</output>

<gadget id="calculator">148 / (37/84)</gadget>
<output>336</output>

<gadget id="calculator">336 * (1/4)</gadget>
<output>84</output>

<result>84</result>