Warehouses A and B store the same number of bags of rice. Later, Warehouse A transports 150 bags of rice to Warehouse B. At this time, the number of bags of rice in Warehouse B is four times that of Warehouse A. How many bags of rice are stored in the two warehouses?
甲、乙两仓库存米的袋数相等，后来由甲仓搬运150袋到乙仓，这时乙仓米的袋数是甲仓的4倍，两个仓库原存米共多少袋？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">150 * (2/3)</gadget>
<output>100</output>

<gadget id="calculator">100 + 150</gadget>
<output>250</output>

<gadget id="calculator">250 * 2</gadget>
<output>500</output>

<result>500</result>