To make a cuboid stone bench with a base area of 25 decimeters and a height of 7 decimeters, how many cubic decimeters of stone are needed.
做一个底面积是25立方分米，高7分米是长方体石凳，需要石料多少立方分米．
<gadget id="calculator">25 * 7</gadget>
<output>175</output>

<result>175</result>