rectangular fish tank measures 60 cm in length, 30 cm in width, and 40 cm in height when measured from the inside. The water surface in the tank is 5 cm from the mouth of the tank. How many liters of water are there in the tank?
一个长方形鱼缸，从里面量长是60厘米，宽是30厘米，高是40厘米，缸内水面离缸口5厘米，鱼缸内有水多少升？
<gadget id="calculator">40 - 5</gadget>
<output>35</output>

<gadget id="calculator">35 / 1_000</gadget>
<output>7/200 = around 0.035</output>

<gadget id="calculator">60 * 30 * (7/200)</gadget>
<output>63</output>

<result>63</result>