In a batch of rice, 16 kg was used (1/5) on the first day, and the remaining (1/3) was used on the second day, leaving 256 kg. How many kg is this batch of rice?
一批大米，第一天用去了(1/5)多16千克，第二天用去了余下的(1/3)，还剩下256千克，原来这批大米有多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">16 * (1/3)</gadget>
<output>16/3 = around 5.333333</output>

<gadget id="calculator">256 - (16/3)</gadget>
<output>752/3 = around 250.666667</output>

<gadget id="calculator">16 + (752/3)</gadget>
<output>800/3 = around 266.666667</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * (1/3)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) - (1/5) - (1/3)</gadget>
<output>-7/15 = around -0.466667</output>

<gadget id="calculator">1 + (-7/15)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(800/3) / (8/15)</gadget>
<output>500</output>

<result>500</result>