Make a cuboid fish tank without a cover, measure 70 cm long, 50 cm wide, and 80 cm high from the inside, and put 65 cm deep water in it. How much is the space for the goldfish to move?
做一个无盖的长方体鱼缸，从里面量长70厘米，宽50厘米，高80厘米，里面放65厘米深的水，请问金鱼的活动空间是多少？
<gadget id="calculator">70 * 50 * 65</gadget>
<output>227_500</output>

<result>227_500</result>