The food store brings in a batch of flour and rice, of which rice accounts for 42% of the total weight, and the rice is 720 kilograms less than the flour. How many kilograms are the rice and flour brought in together?
粮食店运进一批面粉和大米，其中大米占总重量的42%，大米比面粉少720千克，运进大米和面粉共多少千克？
<gadget id="calculator">42 / 100</gadget>
<output>21/50 = around 0.42</output>

<gadget id="calculator">1 - (21/50) - (21/50)</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">720 / (4/25)</gadget>
<output>4_500</output>

<result>4_500</result>