Xinxin blows soap bubbles. Blow once every minute, blow 50 pieces each time, break half of them after 1 minute, leave only (1/10) after 2 minutes, and burst after 2.5 minutes. Question: After Xinxin blows out the 30th time, how many soap bubbles are there in total?
欣欣吹肥皂泡．1分钟吹一次，每次吹50个，经过1分钟破一半，经过2分钟后只留下(1/10)，经过2.5分钟后都破灭．问：欣欣吹出第30次后，一共有几个肥皂泡？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/2) + (1/10)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">50 * (8/5)</gadget>
<output>80</output>

<result>80</result>