There is a batch of rice in the cafeteria, and after eating (3/4), it is transported into 300kg. Now the ratio of the rice in the cafeteria to the rice eaten is 2:3. How many kilograms of original rice in the cafeteria?
食堂有一批大米，吃掉(3/4)后又运进300kg，现在食堂里的大米与吃掉大米的比是2：3．求食堂原有大米多少kg？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/4) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) - (1/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">300 / (1/4)</gadget>
<output>1_200</output>

<result>1_200</result>