There is a batch of grain in the warehouse. After transporting (1/5) away, another 150 tons are transported in. At this time, the number of grains in the warehouse is (7/5) times that of the original grain. How many tons are there in the warehouse?
仓库里有一批粮食，运走(1/5)后，又运进150吨，这时仓库里的粮食吨数是原来的(7/5)倍，仓库里原有粮食多少吨．
<gadget id="calculator">7 / 5</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(7/5) - 1</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(2/5) + (1/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">150 / (3/5)</gadget>
<output>250</output>

<result>250</result>