Mom brought 500 yuan to buy rice, and bought 4 bags of rice and spent 160 yuan. According to this calculation, after buying 8 bags of rice, how much money is left?
妈妈带了500元钱去买大米，买了4袋大米用去160元，照这样计算，买8袋大米后，还剩下多少元？
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">40 * 8</gadget>
<output>320</output>

<gadget id="calculator">500 - 320</gadget>
<output>180</output>

<result>180</result>