The canteen shipped 150 kilograms of rice, which was 30 kilograms less than three times the amount of flour shipped in. How many kilograms of flour did the canteen bring?
食堂运来150千克大米，比运来的面粉的3倍少30千克，食堂运来面粉多少千克？
<gadget id="calculator">150 + 30</gadget>
<output>180</output>

<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<result>60</result>