Lihua Grain Processing Factory processes a batch of rice. The ratio of the tons of processed rice to the tons of unprocessed rice on the first day is 2:3. If another 120 tons are processed, half of the task of this batch of rice can be completed. This batch of rice has How many tons?
丽华粮食加工厂加工一批大米，第一天加工大米的吨数与未加工的大米吨数的比是2：3，如果再加工120吨就可以完成这批大米任务的一半，这批大米有多少吨？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(1/2) - (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">120 / (1/10)</gadget>
<output>1_200</output>

<result>1_200</result>