The number of tourists in the Expo Garden the day before yesterday was about 300,000, the number yesterday was about the day before yesterday (4/5), and the number today was about yesterday (5/6). What is the number of tourists in the Expo Garden today? ?
前天世博园里的游客人数约30万人，昨天的人数约是前天的(4/5)，今天的人数约是昨天的(5/6)，今天世博园里的游客人数约是多少万人？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 * (4/5) * (5/6)</gadget>
<output>20</output>

<result>20</result>