Dongdong's family bought two bags of flour and ate 15 kilograms, which is exactly (3/5) of this bag of flour. How much does this bag of flour weigh?
冬冬家买来二袋面粉，吃了15千克，正好是这袋面粉的(3/5)，这袋面粉重多少千克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / (3/5)</gadget>
<output>25</output>

<result>25</result>