Xiaohong’s family has some rice and flour. After eating 20kg of flour, Dad said: “The rice has been eaten (1/5).” Mom said: “If you buy another 30kg of rice, it will be as much as the original rice.” Xiaohong’s family How many kilograms of rice were there?
小红家有一些大米和面粉，面粉吃了20kg，爸爸说："大米已经吃了(1/5)"妈妈说："如果再买进30kg大米，就和原来大米一样多．"小红家原来有多少千克大米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">30 / (1/5)</gadget>
<output>150</output>

<result>150</result>