A batch of cement is stored on the construction site. After 30% of the cement is used up, another 160 bags are shipped in. At this time, it is more than the original stored cement (1/10), so how many bags of cement were originally stored?
建筑工地储存一批水泥，当用去这批水泥的30%以后，又运来160袋，这时比原来储存的水泥还多(1/10)，那么原来储存水泥多少袋？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/10) - 1</gadget>
<output>-7/10 = around -0.7</output>

<gadget id="calculator">1 + (1/10) + (-7/10)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">160 / (2/5)</gadget>
<output>400</output>

<result>400</result>