There is a cuboid water tank with a length of 60 cm and a width of 50 cm. The purchased watermelon is completely submerged in the water, and the water level rises by 3 cm. What is the volume of this watermelon in cubic decimeters?
有一个长60厘米，宽50厘米的长方体水缸，把买的西瓜完全浸入在水里，水面上升了3厘米．这个西瓜的体积是多少立方分米？
<gadget id="calculator">3 / 1_000</gadget>
<output>3/1_000 = around 0.003</output>

<gadget id="calculator">60 * 50 * (3/1_000)</gadget>
<output>9</output>

<result>9</result>