A batch of rice is shipped from the cafeteria, and the whole (2/5) is eaten on the first day, and the rest (1/3) is eaten on the second day. At this time, there is still 15kg left. How many kilograms of rice are shipped from the cafeteria?
食堂运来一批大米，第一天吃了全部的(2/5)，第二天吃了余下的(1/3)，这时还剩下15kg，食堂运来大米多少千克？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

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

<gadget id="calculator">15 / (2/5)</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>