Uncle Tian sold 80 weekly newspapers and some evening papers yesterday. The weekly newspapers were 1.5 yuan each, and the evening papers were 0.8 yuan each. The total collection was 204 yuan. How many copies of the evening paper did Uncle Tian sell yesterday?
田大爷昨天卖出80份周报和一些晚报，周报每份1.5元，晚报每份0.8元，一共收款204元．田大爷昨天卖出晚报多少份？
<gadget id="calculator">80 * 1.5</gadget>
<output>120</output>

<gadget id="calculator">204 - 120</gadget>
<output>84</output>

<gadget id="calculator">84 / 0.8</gadget>
<output>105</output>

<result>105</result>