A cuboid glass jar filled with water, measured from the inside, is 30cm long, 21cm wide, and 10.6cm deep. After putting a pear into the water, the water depth is 11cm. What is the volume of this pear?
一只盛有水的长方体玻璃缸，从里面量得玻璃缸长30cm，宽21cm、水深10.6cm．把一个梨放入水中后，水深是11cm．这个梨的体积是多少？
<gadget id="calculator">11 - 10.6</gadget>
<output>0.4</output>

<gadget id="calculator">30 * 21 * 0.4</gadget>
<output>252</output>

<result>252</result>