There are two warehouses, A and B. It is known that the warehouses have a total of 150 tons of grain. Now 80% of the stored grain is shipped from A warehouse, and 2/5 of the stored grain is shipped from B warehouse. At this time, the remaining grain in B warehouse is more than A warehouse. The remaining 3 times less than 6 tons, how many tons of original grain in warehouse A?
甲、乙两个仓库，已知仓库粮食共有150吨，现在从甲仓运出存粮的80%，从乙仓运出存粮的(2/5)，这时乙仓剩下的粮食比甲仓剩下的3倍少6吨，甲仓原有粮食多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">150 * (2/5)</gadget>
<output>60</output>

<gadget id="calculator">150 - 60</gadget>
<output>90</output>

<gadget id="calculator">6 + 90</gadget>
<output>96</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) * 3</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">1 - (12/5) - (2/5)</gadget>
<output>-9/5 = around -1.8</output>

<gadget id="calculator">3 + (-9/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">96 / (6/5)</gadget>
<output>80</output>

<result>80</result>