The Qishan granary transported 480 tons of rice, which is equivalent to three times the original amount of stored grain. How many tons of original stored grain?
栖山粮仓运进大米480吨，相当于原来存粮数的3倍，原来存粮多少吨？
<gadget id="calculator">480 / 3</gadget>
<output>160</output>

<result>160</result>