There are 285 kilograms of rice, which is 45 kilograms more than three times the weight of flour. How many kilograms of flour are there?
大米有285千克，比面粉重量的3倍还多45千克，面粉有多少千克？
<gadget id="calculator">285 - 45</gadget>
<output>240</output>

<gadget id="calculator">240 / 3</gadget>
<output>80</output>

<result>80</result>