The rice in bag A is 30 kg more than that in bag B. If (1/5) of the rice is transferred from bag A to bag B, bag B will contain 90 kg of rice. How many kilograms of rice does the original bag contain?
甲袋大米比乙袋大米多30千克，如果从甲袋调(1/5)大米进乙袋，乙袋则有大米90千克．原来甲袋有大米多少千克？
<gadget id="calculator">30 + 90</gadget>
<output>120</output>

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

<gadget id="calculator">(1/5) + 1</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">120 / (6/5)</gadget>
<output>100</output>

<result>100</result>