There are three bags of rice, and bag A accounts for 1/5 of the total. If bag B gives 4 kg to bag A, the weight of the three bags is equal. How many kilograms of rice are there in total for the three bags?
有三袋大米，甲袋占总量的(1/5)，如果乙袋给甲袋4千克，则三袋重量相等．原来三袋共有大米多少千克？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(1/3) - (1/5)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">4 / (2/15)</gadget>
<output>30</output>

<result>30</result>