After 10% of a batch of grain was transferred out of the warehouse, another 72 tons of grain were transferred in. At this time, the ratio of the grain in the warehouse to the original grain was 27:20. How many tons of grain are there in the warehouse?
仓库里有一批粮食调出10%之后，又调入72吨粮食，这时仓库的粮食与原来粮食的比是27：20．仓库里原有粮食多少吨？
<gadget id="calculator">27 / 20</gadget>
<output>27/20 = around 1.35</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(27/20) - (9/10)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">72 / (9/20)</gadget>
<output>160</output>

<result>160</result>