batch of goods is first shipped in (1/4) of the total amount, and then 30 tons are shipped out. At this time, it is 10 tons more than the original one. How many tons were originally stored?
一批货物，先运进总量的(1/4)，又运出30吨，这时比原来多10吨，原来存货物多少吨？
<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 / (1/4)</gadget>
<output>160</output>

<result>160</result>