There is a batch of rice at the Hongqi Grain Station, all (3/5) were shipped away on the first day, and the rest (1/2) was shipped away on the second day, and 27 tons were not shipped in the end. How many tons is this batch of rice?
红旗粮站有一批大米，第一天运走全部的(3/5)，第二天运走剩下的(1/2)，最后还有27吨没有运走．这批大米共有多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/5) * (1/2)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (3/5) - (1/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">27 / (1/5)</gadget>
<output>135</output>

<result>135</result>