There is a batch of grain in the warehouse, and the whole (2/3) is removed by 1 ton. At this time, the ratio of the remaining grain to the total grain in the original storage is 3:5. How many tons of grain did the warehouse have?
仓库有一批粮食，运走全部的(2/3)少1吨，这时剩下的与原存粮食总数的比是3：5，仓库原来有粮食多少吨？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 / (4/15)</gadget>
<output>15/4 = around 3.75</output>

<result>15/4 = around 3.75</result>