A kind of oil barrel is measured from the inside. The bottom surface is a square with a side length of 2.5dm and a height of 3.6dm. If such a barrel of oil is poured into a bottle with a volume of 750mL, how many bottles can be filled?
一种油桶，从里面量，底面是边长为2.5dm的正方形，高是3.6dm，把这样的一桶油注入容积是750mL的瓶子里，可以装满多少瓶？
<gadget id="calculator">1_000 / 750</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">2.5 * 2.5 * 3.6 * (4/3)</gadget>
<output>30</output>

<result>30</result>