The school held the "Great Action of Helping the Poor". The third grade donated 180 yuan, the fourth grade donated 60 yuan less than the third grade, and the fifth grade donated twice that of the fourth grade. How much is the fifth grade donation?
学校举行"帮困爱心大行动"．三年级捐款180元，四年级捐款数比三年级的2倍少60元，五年级捐款数是四年级的2倍，五年级捐款多少元？
<gadget id="calculator">180 * 2</gadget>
<output>360</output>

<gadget id="calculator">360 - 60</gadget>
<output>300</output>

<gadget id="calculator">300 * 2</gadget>
<output>600</output>

<result>600</result>