There are 8 tons of rice in the grain store, and after selling for a week, there are still leftovers (13/20). How many kilograms of rice are sold on average per day?
粮店有8吨大米，卖了一个星期后还剩下(13/20)．平均每天卖出多少千克大米？
<gadget id="calculator">13 / 20</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">1 - (13/20)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(7/20) / 7</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">8 * (1/20) * 1_000</gadget>
<output>400</output>

<result>400</result>