There is a batch of yellow sand on the construction site, which has been used (4/5) tons, and the amount used is less than the remaining (14/15) tons. How many tons of this batch of yellow sand were originally?
建筑工地有一批黄沙，已经用去(4/5)吨，用去的比剩下的少(14/15)吨，这批黄沙原来有多少吨？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">14 / 15</gadget>
<output>14/15 = around 0.933333</output>

<gadget id="calculator">(4/5) + (14/15) + (4/5)</gadget>
<output>38/15 = around 2.533333</output>

<result>38/15 = around 2.533333</result>