The grain store shipped 165 bags of flour, 15 bags more than three times the number of rice bags. How many bags of rice did the grain store ship?
粮店运来面粉165袋，比大米袋数的3倍还多15袋，粮店运来大米多少袋？
<gadget id="calculator">165 - 15</gadget>
<output>150</output>

<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<result>50</result>